In pictures - the best from Barcelona

Sir Frank Williams (GBR) Team Owner Williams F1 Team and Sir Jackie Stewart (GBR) at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Felipe Massa (BRA) Williams with wife Rafaela Bassi (BRA) and son Felipinho Massa (BRA) at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Jemma Boskovich (AUS) girlfriend of Daniel Ricciardo (AUS) Red Bull Racing at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Maurizio Arrivabene (ITA) Ferrari Team Principal at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Claire Williams (GBR) Williams Deputy Team Principal at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Daniil Kyvat (RUS) Red Bull Racing on the drivers parade at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Grid Girls at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Roberto Merhi (ESP) Marussia at the drivers parade at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Romain Grosjean (FRA) Lotus F1 on the drivers parade at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 at the drivers parade at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari on the drivers parade at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF15-T on the grid at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 on the grid at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Giant flag on the grid at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Drivers observe the National Anthem on the grid at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 at the start of the race at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF15-T leads Lewis Hamilton (GBR) Mercedes AMG F1 W06 at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Sergio Perez (MEX) Force India VJM08 and Marcus Ericsson (SWE) Sauber C34 battle at the start of the race at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Romain Grosjean (FRA) Lotus E23 Hybrid and Daniel Ricciardo (AUS) Red Bull Racing RB11 at the start of the race at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Romain Grosjean (FRA) Lotus E23 Hybrid and Carlos Sainz jr (ESP) Scuderia Toro Rosso STR10 battle at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W06 at the start of the race at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Felipe Massa (BRA) Williams FW37 and Max Verstappen (NDL) Scuderia Toro Rosso STR10 at the start of the race at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Grid girl at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Race winner Nico Rosberg (GER) Mercedes AMG F1 W06 crosses the line at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Race winner Nico Rosberg (GER) Mercedes AMG F1 celebrates with the champagne on the podium at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

L to R): Lewis Hamilton (GBR) Mercedes AMG F1, Tony Ross (GBR) Mercedes AMG F1 Race Engineer, race winner Nico Rosberg (GER) Mercedes AMG F1 and Sebastian Vettel (GER) Ferrari celebrate on the podium at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 celebrates with his wife Vivian Sibold (GER) in parc ferme at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 at the start at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Max Verstappen (NDL) Scuderia Toro Rosso and Carlos Sainz jr (ESP) Scuderia Toro Rosso in parc ferme at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF15-T and Lewis Hamilton (GBR) Mercedes AMG F1 W06 battle at the start at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Race winner Nico Rosberg (GER) Mercedes AMG F1 celebrates in parc ferme at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Race winner Nico Rosberg (GER) Mercedes AMG F1 celebrates in parc ferme with Lewis Hamilton (GBR) Mercedes AMG F1 at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Race winner Nico Rosberg (GER) Mercedes AMG F1 W06 crosses the line at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 leads at the start at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Race winner Nico Rosberg (GER) Mercedes AMG F1 celebrates with his trophy on the podium at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 celebrates on the podium at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari celebrates on the podium at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

L to R): Lewis Hamilton (GBR) Mercedes AMG F1, Tony Ross (GBR) Mercedes AMG F1 Race Engineer, race winner Nico Rosberg (GER) Mercedes AMG F1 and Sebastian Vettel (GER) Ferrari celebrate on the podium at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Race winner Nico Rosberg (GER) Mercedes AMG F1 celebrates on the podium with the champagne at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Race winner Nico Rosberg (GER) Mercedes AMG F1 celebrates with the trophy at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Race winner Nico Rosberg (GER) Mercedes AMG F1 celebrates with the team at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Jenson Button (GBR) McLaren MP4-30 at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Podium ceremony viewed form the grandstand with fans on track at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Pastor Maldonado (VEN) Lotus E23 Hybrid with his broken rear wing at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 celebrates in parc ferme at Formula One World Championship, Rd5, Spanish Grand Prix Race, Barcelona, Spain, Sunday 10 May 2015. © Sutton Motorsport Images

Jean Alesi (FRA) at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

The car of Daniil Kvyat (RUS) Red Bull Racing RB11 is worked on in the garage at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Felipe Nasr (BRA) Sauber C34 at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Jenson Button (GBR) McLaren at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Pastor Maldonado (VEN) Lotus E23 Hybrid at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF15-T at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W06 at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Daniil Kyvat (RUS) Red Bull Racing at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Pastor Maldonado (VEN) Lotus E23 Hybrid at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Max Verstappen (NDL) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Roberto Merhi (ESP) Marussia at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Felipe Massa (BRA) Williams FW37 at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Daniil Kvyat (RUS) Red Bull Racing RB11 at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Nico Hulkenberg (GER) Force India VJM08 at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Will Stevens (GBR) Marussia at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Mansour Ojjeh (KSA) TAG and McLaren team owner and Norbert Haug (GER) at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

(L to R): Sebastian Vettel (GER) Ferrari, pole sitter Nico Rosberg (GER) Mercedes AMG F1 and Lewis Hamilton (GBR) Mercedes AMG F1 celebrate in parc ferme at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 celebrates pole position in Parc Ferme at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 in parc ferme at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Pole sitter Nico Rosberg (GER) Mercedes AMG F1 and Lewis Hamilton (GBR) Mercedes AMG F1 in parc ferme at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari celebrates in parc ferme at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Pole sitter Nico Rosberg (GER) Mercedes AMG F1 celebrates in parc ferme at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Grid girls at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

lre Sebastian Vettel (GER) Ferrari, pole sitter Nico Rosberg (GER) Mercedes AMG F1 and Lewis Hamilton (GBR) Mercedes AMG F1 celebrate in parc ferme at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Girls in the paddock at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Sergio Perez (MEX) Force India at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Jenson Button (GBR) McLaren MP4-30 at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing RB11 at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Felipe Massa (BRA) Williams FW37 at Formula One World Championship, Rd5, Spanish Grand Prix Qualifying, Barcelona, Spain, Saturday 9 May 2015. © Sutton Motorsport Images

Nico Hulkenberg (GER) Force India F1 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Pastor Maldonado (VEN) Lotus at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Jenson Button (GBR) McLaren MP4-30 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Red Bull Racing RB11 in the garage at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Roberto Merhi (SPA) Marussia at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Pastor Maldonado (VEN) Lotus E23 Hybrid at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Susie Wolff (GBR) Williams FW37 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Felipe Nasr (BRA) Sauber C34 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Carlos Sainz jr (ESP) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Ron Dennis (GBR) McLaren Executive Chairman at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W06 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Carmen Jorda (ESP) Lotus F1 Development Driver at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Felipe Massa (BRA) Williams FW37 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF15-T at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Carlos Sainz jr (ESP) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W06 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Raffaele Marciello (ITA) Sauber Test and Reserve Driver at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Max Verstappen (NDL) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Max Verstappen (NDL) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Jenson Button (GBR) McLaren at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Raffaele Marciello (ITA) Sauber Test and Reserve Driver at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Susie Wolff (GBR) Williams Test and Development Driver at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Felipe Massa (BRA) Williams FW37 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Sergio Perez (MEX) Force India VJM08 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Jenson Button (GBR) McLaren MP4-30 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Pascal Wehrlein (GER) Mercedes AMG F1 Test and Reserve Driver at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Roberto Merhi (ESP) Marussia at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Max Verstappen (NDL) Scuderia Toro Rosso STR10 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing RB11 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Ferrari SF15-T rear diffuser detail at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Felipe Nasr (BRA) Sauber at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Nico Hulkenberg (GER) Force India VJM08 and tyre smoke at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Felipe Massa (BRA) Williams FW37 makes a pit stop at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 W06 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

(L to R): Nick Chester (GBR) Lotus Technical Director, Jonathan Neale (GBR) McLaren Managing Director, Giampaolo Dall'ara, Sauber Head of Track Engineering, Rob Smedley (GBR) Williams Head of Vehicle Performance, Paddy Lowe (GBR) Mercedes AMG F1 Executive Director (Technical) and Paul Monaghan (GBR) Red Bull Racing Chief Engineer in the Press Conference at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Nico Hulkenberg (GER) Force India VJM08 at Formula One World Championship, Rd5, Spanish Grand Prix Practice, Barcelona, Spain, Friday 8 May 2015. © Sutton Motorsport Images

Ferrari logo at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Pastor Maldonado (VEN) Lotus signs autographs with fans at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 talks with the media at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Maurizio Arrivabene (ITA) Ferrari Team Principal at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Roberto Merhi (ESP) Marussia at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Jenson Button (GBR) McLaren signs autographs for the fans at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Carlos Sainz jr (ESP) Scuderia Toro Rosso, Fernando Alonso (ESP) McLaren at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Fans at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Roberto Merhi (ESP) Marussia, Carlos Sainz jr (ESP) Scuderia Toro Rosso, Fernando Alonso (ESP) McLaren at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Mercedes motorhome at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Susie Wolff (GBR) Williams Development Driver at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Pit Lane entry at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Pirelli tyre at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Marcus Ericsson (SWE) Sauber walks the track at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Max Verstappen (NDL) Scuderia Toro Rosso walks the track at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Medical car at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Sergio Perez (MEX) Force India and Nico Hulkenberg (GER) Force India F1 at The Taste of Mexico in Barcelona event in the Force India Motorhome at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Carmen Jorda (ESP) Lotus F1 Development Driver at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari rides a bike on the track at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

McLaren MP4-30 nose detail at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Felipe Massa (BRA) Williams at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren in the press conference at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

(L to R): Felipe Nasr (BRA) Sauber, Nico Rosberg (GER) Mercedes AMG F1, Daniil Kyvat (RUS) Red Bull Racing, Carlos Sainz jr (ESP) Scuderia Toro Rosso, Fernando Alonso (ESP) McLaren and Roberto Merhi (SPA) Marussia in the press conferance at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Marcus Ericsson (SWE) Sauber at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Mercedes AMG F1 W06 front brake and wheel hub detail at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Max Verstappen (NDL) Scuderia Toro Rosso walks the circuit at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Williams FW37 mirror at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Susie Wolff (GBR) Williams Development Driver and Valtteri Bottas (FIN) Williams walk the circuit at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

McLaren Motorhome at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

(L to R): Paul Monaghan (GBR) Red Bull Racing Chief Engineer and Christian Horner (GBR) Red Bull Racing Team Principal at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

Leader board at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images

McLaren MP4-30 engine cover detail at Formula One World Championship, Rd5, Spanish Grand Prix Preparations, Barcelona, Spain, Thursday 7 May 2015. © Sutton Motorsport Images