In pictures - pre-season testing in Barcelona

Esteban Gutierrez (MEX) Haas VF-16 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Aero sensor on the rear wing of Fernando Alonso (ESP) McLaren MP4-31 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes-Benz F1 W07 Hybrid and Daniil Kvyat (RUS) Red Bull Racing RB12 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren MP4-31 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari SF16-H at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Kevin Magnussen (DEN) Renault Sport F1 Team RS16 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Guenther Steiner (ITA) Haas F1 Team Prinicipal at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Scuderia Toro Rosso STR11 barge board at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Alfonso Celis jr (MEX) Force India Test Driver at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Red Bull Racing RB12 exhaust and rear diffuser detail at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Rio Haryanto (IDN) Manor Racing MRT05 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari SF16-H at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Mercedes-Benz F1 W07 exhaust at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Gene Haas (USA) Founder and Chairman, Haas F1 Team at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren MP4-31 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Felipe Nasr (BRA) Sauber C34 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Jos Verstappen (NED) at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Alfonso Celis jr (MEX) Force India VJM09 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Rio Haryanto (IDN) Manor Racing at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes-Benz F1 W07 Hybrid at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Felipe Nasr (BRA) Sauber C34 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Felipe Nasr (BRA) Sauber at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes-Benz F1 W07 Hybrid and Daniil Kvyat (RUS) Red Bull Racing RB12 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes-Benz F1 W07 Hybrid at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Rio Haryanto (IDN) Manor Racing MRT05 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Felipe Massa (BRA) Williams FW38 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Alfonso Celis jr (MEX) Force India VJM09 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images
A selection of the best images from the opening test of 2016 at Spain's Circuit de Barcelona-Catalunya, starting with Thursday...
And from Wednesday...

Nico Rosberg (GER) Mercedes-Benz F1 W07 Hybrid with sero sensors at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Daniil Kvyat (RUS) Red Bull Racing RB12 with aero sensors at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Nico Hulkenberg (GER) Force India VJM09 at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Daniil Kvyat (RUS) Red Bull Racing RB12 with aero sensors at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Felipe Nasr (BRA) Sauber C34 at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Romain Grosjean (FRA) Haas VF-16 at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Rio Haryanto (IDN) Manor Racing MRT05 at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Kevin Magnussen (DEN) Renault Sport F1 Team RS16 at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Carlos Sainz (ESP) Scuderia Toro Rosso STR11 stops on track at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Carlos Sainz (ESP) Scuderia Toro Rosso STR11 stops on track at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Kevin Magnussen (DEN) Renault Sport F1 Team RS16 at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Renault Sport F1 Team RS16 nose and front wing at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Felipe Massa (BRA) Williams FW38 at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Jenson Button (GBR) McLaren MP4-31 with aero sensor at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Max Verstappen (NED) Scuderia Toro Rosso at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Romain Grosjean (FRA) Haas VF-16 at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

McLaren mechanics at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Simon Rennie (GBR) Red Bull Racing Race Engineer at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Rio Haryanto (IDN) Manor Racing MRT05 at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

The car of Rio Haryanto (IDN) Manor Racing MRT05 is recovered to the pits after stopping on track at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Daniil Kvyat (RUS) Red Bull Racing RB12 is pushed back by the Red Bull Racing mechanics under yellow flag after stopping in pit lane at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Ron Meadows (GBR) Mercedes AMG F1 Team Manager, Pascal Wehrlein (GER) Manor Racing and Paddy Lowe (GBR) Mercedes AMG F1 Executive Director (Technical) at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Dr Helmut Marko (AUT) Red Bull Motorsport Consultant and Christian Horner (GBR) Red Bull Racing Team Principal at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Rio Haryanto (IDN) Manor Racing MRT05 at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Rio Haryanto (IDN) Manor Racing at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Nico Hulkenberg (GER) Force India VJM09 at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Guenther Steiner (ITA) Haas F1 Team Prinicipal at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari SF16-H at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Gene Haas (USA) Founder and Chairman, Haas F1 Team at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

The car of Rio Haryanto (IDN) Manor Racing MRT05 is recovered to the pits at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Daniil Kvyat (RUS) Red Bull Racing RB12 at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Rio Haryanto (IDN) Manor Racing MRT05 at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Kevin Magnussen (DEN) Renault Sport F1 Team RS16 and aero sensors at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari SF16-H at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Kevin Magnussen (DEN) Renault Sport F1 Team RS16 stops on track at Formula One Testing, Day Three, Barcelona, Spain, Wednesday 24 February 2016. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 talks to the media at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari SF16-H at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Daniil Kvyat (RUS) Red Bull Racing RB12 and Lewis Hamilton (GBR) Mercedes-Benz F1 W07 Hybrid at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Mercedes-Benz F1 W07 Hybrid front wing detail at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Mercedes-Benz F1 W07 Hybrid nose detail at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Felipe Nasr (BRA) Sauber C34 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Kimi Raikkonen (FIN) Ferrari SF16-H at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Kevin Magnussen (DEN) Renault Sport F1 Team RS16 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Esteban Gutierrez (MEX) Haas VF-16 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes AMG F1 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Daniil Kvyat (RUS) Red Bull Racing RB12 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 at Formula One Testing, Day Four, Barcelona, Spain, Thursday 25 February 2016. © Sutton Motorsport Images
And from Tuesday...

Fernando Alonso (ESP) McLaren MP4-31 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Marcus Ericsson (SWE) Sauber C34 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Pascal Wehrlein (GER) Manor Racing MRT05 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes-Benz F1 W07 Hybrid at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren MP4-31 with aero sensor at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Sergio Perez (MEX) Force India VJM09 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing RB12 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Valtteri Bottas (FIN) Williams FW38 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Sergio Perez (MEX) Force India VJM09 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF16-H behind the screens at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Max Verstappen (NED) Scuderia Toro Rosso STR11 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Gene Haas (USA) Founder and Chairman, Haas F1 Team at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Fernando Alonso (ESP) McLaren MP4-31 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes-Benz F1 W07 Hybrid at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Force India pit wall gantry in the garage at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Sergio Perez (MEX) Force India VJM09 with aero paint on the rear wing at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Sergio Perez (MEX) Force India VJM09 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes-Benz F1 W07 Hybrid at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing RB12 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Marcus Ericsson (SWE) Sauber C34 with aero sensor at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Jolyon Palmer (GBR) Renault Sport F1 Team RS16 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF16-H at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing RB12 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF16-H at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Sergio Perez (MEX) Force India VJM09 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Max Verstappen (NED) Scuderia Toro Rosso at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing RB12 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Gene Haas (USA) Founder and Chairman, Haas F1 Team at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

The car of Max Verstappen (NED) Scuderia Toro Rosso STR11 is recovered to the pits at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Max Verstappen (NED) Scuderia Toro Rosso STR11 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Red Bull Racing RB12 front splitter / floor detail at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF16-H at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes-Benz F1 W07 Hybrid at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Max Verstappen (NED) Scuderia Toro Rosso STR11 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Keke Rosberg (FIN) at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF16-H at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Sergio Perez (MEX) Force India VJM09 rear wing and exhaust detail at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Max Verstappen (NED) Scuderia Toro Rosso returns to the pits after stopping on track at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Valtteri Bottas (FIN) Williams FW38 at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Nico Rosberg (GER) Mercedes-Benz F1 W07 Hybrid at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images

Lara Alvarez (ESP) girlfriend of Fernando Alonso (ESP) McLaren takes a photograph at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF16-H at Formula One Testing, Day Two, Barcelona, Spain, Tuesday 23 February 2016. © Sutton Motorsport Images
And from Monday...

Sebastian Vettel (GER) Ferrari SF16-H at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

(L to R): Andy Cowell (GBR) Managing Director, Mercedes AMG High Performance Powertrains, Lewis Hamilton (GBR) Mercedes AMG F1, Toto Wolff (AUT) Mercedes AMG F1 Director of Motorsport, Nico Rosberg (GER) Mercedes AMG F1 and Paddy Lowe (GBR) Mercedes AMG F1 Executive Director (Technical) with the Mercedes-Benz F1 W07 Hybrid at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

The Renault Sport F1 Team RS16 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Jolyon Palmer (GBR) Renault Sport F1 Team RS16 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 and Nico Rosberg (GER) Mercedes AMG F1 unveil the Mercedes-Benz F1 W07 Hybrid at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Jenson Button (GBR) McLaren MP4-31 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

The Haas VF-16 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing RB11 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Carlos Sainz jr (ESP) Scuderia Toro Rosso STR11 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Valtteri Bottas (FIN) Williams FW38 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Romain Grosjean (FRA) Haas VF-16 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Pascal Wehrlein (GER) Manor GP at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Romain Grosjean (FRA) Haas VF-16 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Marcus Ericsson (SWE) Sauber C34 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

(L to R): Nico Hulkenberg (GER) Force India F1, Alfonso Celis jr (MEX) Force India Test Driver and Sergio Perez (MEX) Force India with the Force India VJM09 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Pascal Wehrlein (GER) Manor Racing at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Jenson Button (GBR) McLaren MP4-31 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Marcus Ericsson (SWE) Sauber C34 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W07 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Esteban Gutierrez (MEX) Haas F1 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes-Benz F1 W07 Hybrid at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Jenson Button (GBR) McLaren MP4-31 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Guenther Steiner (ITA) Haas F1 Team Prinicipal at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Max Verstappen (NDL) Scuderia Toro Rosso and Xevi Pujolar (ESP) Scuderia Toro Rosso Engineer at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Pascal Wehrlein (GER) Manor Racing MRT05 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Daniel Ricciardo (AUS) Red Bull Racing RB12 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Carlos Sainz jr (ESP) Scuderia Toro Rosso STR11 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Sebastian Vettel (GER) Ferrari SF16-H at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Tyre marks at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Lewis Hamilton (GBR) Mercedes AMG F1 W07 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Jenson Button (GBR) McLaren MP4-31 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Romain Grosjean (FRA) Haas VF-16 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images

Romain Grosjean (FRA) Haas VF-16 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images
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