In pictures - the best of Russia

Scenic view and flags at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Carlos Sainz (ESP) Scuderia Toro Rosso at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari and Kimi Raikkonen (FIN) Ferrari at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Ferrari mechanics with Ferrari SF15-T front wing at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Mountains / scenic view at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren and Jenson Button (GBR) McLaren with Ingrid Olerinskaya (RUS) Actress and Adelina Sotnikova (RUS) Olympic Fgure Skater at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Carlos Sainz (ESP) Scuderia Toro Rosso talks with the media at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Ingrid Olerinskaya (RUS) Actress and Adelina Sotnikova (RUS) Olympic Fgure Skater at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Marshals at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing and Nico Hulkenberg (GER) Force India F1 at the drivers parade at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 at the drivers parade at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Grid Girls Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Grid entertainment at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W06 on the grid at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Carlos Sainz (ESP) Scuderia Toro Rosso STR10 on the grid at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Carlos Sainz (ESP) Scuderia Toro Rosso skipping at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 on the driver parade at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Grid at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Drivers parade at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Grid entertainment at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Grid entertainment at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W06 and Nico Rosberg (GER) Mercedes AMG F1 W06 battle for position at the start of the race at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Max Verstappen (NDL) Scuderia Toro Rosso STR10 with rear puncture on lap one at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 leads at the start of the race at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Nico Hulkenberg (GER) Force India VJM08 and Marcus Ericsson (SWE) Sauber C34 crash on lap one at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 leads Lewis Hamilton (GBR) Mercedes AMG F1 W06 at the start of the race at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari SF15-T and Sebastian Vettel (GER) Ferrari SF15-T battle at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

The car of Marcus Ericsson (SWE) Sauber C34 is recovered one at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Safety car leads the field at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 retires from the race at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Daniil Kvyat (RUS) Red Bull Racing RB11 at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF15-T and Kimi Raikkonen (FIN) Ferrari SF15-T battle at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Valtteri Bottas (FIN) Williams FW37 at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF15-T at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Max Verstappen (NDL) Scuderia Toro Rosso STR10 with pucture on lap one at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 leads Lewis Hamilton (GBR) Mercedes AMG F1 W06 at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 and Lewis Hamilton (GBR) Mercedes AMG F1 W06 at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Daniil Kvyat (RUS) Red Bull Racing RB11 at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W06 at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Race winner Lewis Hamilton (GBR) Mercedes AMG F1 celebrates on the podium at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Race winner Lewis Hamilton (GBR) Mercedes AMG F1 W06 celebrates in parc ferme at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Race winner Lewis Hamilton (GBR) Mercedes AMG F1 W06 crosses the line and takes the chequered flag at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Race winner Lewis Hamilton (GBR) Mercedes AMG F1 celebrates on the podium with champagne at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari celebrates on the podium with champagne at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Sergio Perez (MEX) Force India celebrates in parc ferme at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 and Sebastian Vettel (GER) Ferrari in the Press Conference at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 and Sergio Perez (MEX) Force India in the Press Conference at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W06 celebrates in parc ferme at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W06 celebrates in parc ferme at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

(L-R) Sebastian Vettel (GER) Ferrari, Andy Cowell (GBR) Managing Director, race winner Lewis Hamilton (GBR) Mercedes AMG F1 and Sergio Perez (MEX) Force India celebrate on the podium at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Sergio Perez (MEX) Force India celebrates third place in parc ferme at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

The recovered car of Romain Grosjean (FRA) Lotus E23 Hybrid after crashing out of the race at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Jenson Button (GBR) McLaren MP4-30 and Felipe Massa (BRA) Williams FW37 at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Sergio Perez (MEX) Force India celebrates in parc ferme at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

(L to R): Andy Cowell (GBR) Managing Director, Vladimir Putin (RUS), President of Russia, Sebastian Vettel (GER) Ferrari, race winner Lewis Hamilton (GBR) Mercedes AMG F1 and Sergio Perez (MEX) Force India celebrate on the podium at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari SF15-T at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Felipe Massa (BRA) Williams FW37 at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Fans at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Sergio Perez (MEX) Force India VJM08 at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Fans and Daniil Kyvat (RUS) Red Bull Racing signage on the grandstand at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Grid Girls in the Press Conference at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1, Sebastian Vettel (GER) Ferrari and Sergio Perez (MEX) Force India on the podium at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 celebrates with Nico Rosberg (GER) Mercedes AMG F1 and the team at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Jenson Button (GBR) McLaren and Romain Grosjean (FRA) Lotus F1 at the drivers parade at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 celebrates with Nico Rosberg (GER) Mercedes AMG F1 and the team at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing RB11 and Max Verstappen (NDL) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari celebrates on the podium at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Sergio Perez (MEX) Force India celebrates on the podium at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari celebrates with the champagne on the podium at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Third placed Sergio Perez (MEX) Force India celebrates with the team at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Olympic Park at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 during the drivers parade at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Sergio Perez (MEX) Force India celebrates with champagne on the podium at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Race winner Lewis Hamilton (GBR) Mercedes AMG F1 celebrates with the trophy on the podium at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Grid entertainment at Formula One World Championship, Rd15, Russian Grand Prix, Race, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Sunday 11 October 2015. © Sutton Motorsport Images

Russian President Vladimir Putin with Formula One group CEO Bernie Ecclestone at the 2015 Formula 1 Russian Grand Prix in Sochi. © Mario Renzi

Russian President Vladimir Putin with Formula One group CEO Bernie Ecclestone at the 2015 Formula 1 Russian Grand Prix in Sochi. © Mario Renzi

Formula One group CEO Bernie Ecclestone with Ferrari's Sebastian Vettel at the 2015 Formula 1 Russian Grand Prix in Sochi. © Mario Renzi

Russian President Vladimir Putin with Mercedes' Lewis Hamilton at the 2015 Formula 1 Russian Grand Prix in Sochi. © Mario Renzi

Mercedes AMG F1 mechanics at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Ferrari practice pit stops at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Pirelli tyres at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Mercedes AMG F1 W06 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Felipe Massa (BRA) Williams FW37 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Daniil Kvyat (RUS) Red Bull Racing RB11 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Will Stevens (GBR) Marussia at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Max Verstappen (NDL) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Puma gloves of Lewis Hamilton (GBR) Mercedes AMG F1 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Jenson Button (GBR) McLaren at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Sergio Perez (MEX) Force India VJM08 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Fans at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Medical crew attend to Carlos Sainz (ESP) Scuderia Toro Rosso STR10 following his crash in FP3 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

The crashed car of Carlos Sainz (ESP) Scuderia Toro Rosso in FP3 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

The crashed car of Carlos Sainz (ESP) Scuderia Toro Rosso is recovered from under the tech pro barrier in FP3 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren MP4-30 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Valtteri Bottas (FIN) Williams FW37 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Max Verstappen (NDL) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Pastor Maldonado (VEN) Lotus E23 Hybrid at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari SF15-T at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W06 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Jenson Button (GBR) McLaren MP4-30 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren MP4-30 and Lewis Hamilton (GBR) Mercedes AMG F1 W06 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Nico Hulkenberg (GER) Force India VJM08 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Cars in the pitlane at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

(L to R): Valtteri Bottas (FIN) Williams, Pole sitter Nico Rosberg (GER) Mercedes AMG F1 and Lewis Hamilton (GBR) Mercedes AMG F1 celebrate in parc ferme at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Pole sitter Nico Rosberg (GER) Mercedes AMG F1 celebrates in parc ferme at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W06 looks at the car of Sebastian Vettel (GER) Ferrari SF15-T in parc ferme at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Grid Girls at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W06 looks at the car of Sebastian Vettel (GER) Ferrari SF15-T in parc ferme at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 in the press conference at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Marcus Ericsson (SWE) Sauber C34 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari SF15-T at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Carlos Sainz jr (ESP) Scuderia Toro Rosso is flown to hospital in the medical helicopter following his crash in FP3 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Mercedes AMG F1 mechanic washes pit tyres and wheels at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Felipe Massa (BRA) Williams FW37 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Will Stevens (GBR) Marussia at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren MP4-30 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Max Verstappen (NDL) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Atmosphere at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari SF15-T at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Sergio Perez (MEX) Force India VJM08 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF15-T at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Carlos Sainz (ESP) Scuderia Toro Rosso STR10 locks up at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari SF15-T in parc ferme at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Media pen at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Sunset over the track at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Sunset and helicopter at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Romain Grosjean (FRA) Lotus E23 Hybrid at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Valtteri Bottas (FIN) Williams celebrates in parc ferme at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing RB11 in parc ferme at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Valtteri Bottas (FIN) Williams FW37 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Marshals at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Massimo Rivola (ITA) Ferrari Sporting Director at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Dry ice at Formula One World Championship, Rd15, Russian Grand Prix, Qualifying, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Saturday 10 October 2015. © Sutton Motorsport Images

Paul Hembery (GBR) Pirelli Motorsport Director at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Claire Williams (GBR) Williams Deputy Team Principal at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Hedge cut into a F1 car shape, topiary, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Ferrari personnel at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren celebrates 250 Grands Prix with Eric Boullier (FRA) McLaren Racing Director, Jenson Button (GBR) McLaren and the team at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari and Esteban Gutierrez (MEX) Ferrari Test and Reserve Driver at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren celebrates 250 Grands Prix with Eric Boullier (FRA) McLaren Racing Director, Jenson Button (GBR) McLaren and the team at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Williams FW37 steering wheel detail at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Valtteri Bottas (FIN) Williams at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Marcus Ericsson (SWE) Sauber C34 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren and Eric Boullier (FRA) McLaren Racing Director at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Pastor Maldonado (VEN) Lotus at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Marshals clean the track before FP1 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Jolyon Palmer (GBR) Lotus Test and Reserve Driver at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Carlos Sainz (ESP) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Marshals and Firemen clean the track at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Marshals and Marcus Ericsson (SWE) Sauber C34 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren MP4-30 and Sebastian Vettel (GER) Ferrari SF15-T at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Daniil Kyvat (RUS) Red Bull Racing at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Mercedes AMG F1 W06 sensor on front wing at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF15-T at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Will Stevens (GBR) Marussia at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari SF15-T runs wide at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

McLaren MP4-30 detail at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Felipe Massa (BRA) Williams at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Max Verstappen (NDL) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Carlos Sainz (ESP) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Will Stevens (GBR) Marussia at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Frank Williams (GBR) Williams Team Owner at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Xavi Martos (ESP) trainer to Sergio Perez (MEX) Force India at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF15-T at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren MP4-30 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Roberto Merhi (ESP) Marussia at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Red Bull Racing RB11 front wing detail at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF15-T at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Carlos Sainz jr (ESP) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W06 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Carlos Sainz jr (ESP) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Pastor Maldonado (VEN) Lotus with Mark Slade (GBR) Lotus F1 Race Engineer and Federico Gastaldi (ARG) Lotus F1 Team Deputy Team Principal at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Jenson Button (GBR) McLaren MP4-30 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Rear action at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Felipe Massa (BRA) Williams FW37 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Jolyon Palmer (GBR) Lotus E23 Hybrid at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Mechanics and Red Bull Racing RB11 at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

(L to R): Graeme Lowdon (GBR) Chief Executive Officer Manor GP, Monisha Kaltenborn (AUT) Sauber Team Prinicpal, Paul Hembery (GBR) Pirelli Motorsport Director, Rob Smedley (GBR) Williams Head of Vehicle Performance and Paul Monaghan (GBR) Red Bull Racing Chief Engineer in the Press Conference at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Rob Smedley (GBR) Williams Head of Vehicle Performance in the press conference at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Graeme Lowdon (GBR) Marussia in the press conference at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Monisha Kaltenborn (AUT) Sauber Team Prinicpal in the press conference at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Paul Monaghan (GBR) Red Bull Racing in the press conference at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Dmitry Kozak (RUS) Deputy Prime Minister of the Russian Federation in the Safety Car at Formula One World Championship, Rd15, Russian Grand Prix, Practice, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Friday 9 October 2015. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

McLaren mechanic and Pirelli tyres at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Paddock at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Ferrari SF15-T nose and front wings at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Daniil Kvyat (RUS) Red Bull Racing at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Nico Hulkenberg (GER) Force India F1 in support of the Social Media Hashtag #F1Sochi at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Pirelli tyres at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Main straight and finish line at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Ferrari detail at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Sochi logo at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Red Bull Pit equipment at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Pirelli tyre marking at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Medical car at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Main straight at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Mclaren MP4-30 nose and front wing at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Jenson Button (GBR) McLaren at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Roberto Merhi (ESP) Marussia walks the track at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Mercedes AMG F1 W06 front brake and wheel hub detail at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Sergio Perez (MEX) Force India at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Paddy Lowe (GBR) Mercedes AMG F1 Executive Director (Technical) at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

(L to R): Fernando Alonso (ESP) McLaren, Nico Rosberg (GER) Mercedes AMG F1, Felipe Massa (BRA) Williams, Carlos Sainz jr (ESP) Scuderia Toro Rosso, Romain Grosjean (FRA) Lotus and Daniil Kvyat (RUS) Red Bull Racing in the press conference at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren in the press conference at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Felipe Massa (BRA) Williams in the press conference at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Carlos Sainz (ESP) Scuderia Toro Rosso in the press conference at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Track view at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Olympic Cauldron at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren signs autographs for the fans at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Jenson Button (GBR) McLaren signs autographs for the fans at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Fans at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari, James Allison (GBR) Ferrari Chassis Technical Director and the team walk the track at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Track view at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Daniil Kyvat (RUS) Red Bull Racing and engineer walk the track at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

(L to R): Sergey Sirotkin (RUS) Rapax GP2, Artem Markelov (RUS) Russian Time GP2, Daniil Kvyat (RUS) Red Bull Racing at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Williams pit stop practice at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Teams at scrutineering with fans at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari walks the track with his engineers at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Daniil Kvyat (RUS) Red Bull Racing and a prize winner at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Williams pit stop practice at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Bernie Ecclestone (GBR) CEO Formula One Group (FOM) and Maurizio Arrivabene (ITA) Ferrari Team Principal at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing signs autographs for the fans at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 during the autograph session at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Mercedes AMG F1 mechanics with Mercedes AMG F1 W06 floor at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari during the autograph session at Formula One World Championship, Rd15, Russian Grand Prix, Preparations, Sochi Autodrom, Sochi, Krasnodar Krai, Russia, Thursday 8 October 2015. © Sutton Motorsport Images