Fernando Alonso (ESP) McLaren MCL33 with aero paint at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Mark Sutton/Sutton Images
Kimi Raikkonen (FIN) Ferrari SF-71H at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Mark Sutton/Sutton Images
Esteban Ocon (FRA) Force India VJM11 at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Jerry Andre/Sutton Images
Fans at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Mark Sutton/Sutton Images
Lewis Hamilton (GBR) Mercedes-AMG F1 W09 EQ Power+ with aero sensors at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Jerry Andre/Sutton Images
Jack Aitken (GBR) Renault Sport F1 Team Third and Reserve Driver at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Mark Sutton/Sutton Images
Daniel Ricciardo (AUS) Red Bull Racing RB14 at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Jerry Andre/Sutton Images
Brendon Hartley (NZL) Scuderia Toro Rosso STR13 at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Jerry Andre/Sutton Images
Romain Grosjean (FRA) Haas VF-18 at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Jerry Andre/Sutton Images
Sergey Sirotkin (RUS) Williams FW41 at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Jerry Andre/Sutton Images
Carlos Sainz jr (ESP) Renault Sport F1 Team RS18 with aero sensors at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Jerry Andre/Sutton Images
Kimi Raikkonen (FIN) Ferrari SF-71H at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Jerry Andre/Sutton Images
Kimi Raikkonen (FIN) Ferrari SF-71H at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Jerry Andre/Sutton Images
Charles Leclerc (MON) Alfa Romeo Sauber C37 crashes at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Stefano Arcari/Sutton Images
Charles Leclerc (MON) Alfa Romeo Sauber F1 Team walks in after crashing at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Stefano Arcari/Sutton Images
Lewis Hamilton (GBR) Mercedes-AMG F1 W09 EQ Power+ at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Mark Sutton/Sutton Images
Sergey Sirotkin (RUS) Williams FW41 at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Jerry Andre/Sutton Images
Robert Kubica (POL) Williams talks with the media at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Mark Sutton/Sutton Images
Romain Grosjean (FRA) Haas VF-18 at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Mark Sutton/Sutton Images
Kimi Raikkonen (FIN) Ferrari SF-71H at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Mark Sutton/Sutton Images
Charles Leclerc (MON) Alfa Romeo Sauber C37 at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Mark Sutton/Sutton Images
Brendon Hartley (NZL) Scuderia Toro Rosso STR13 and Kimi Raikkonen (FIN) Ferrari SF-71H at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Mark Sutton/Sutton Images
Maurizio Arrivabene (ITA) Ferrari Team Principal at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Mark Sutton/Sutton Images
Fernando Alonso (ESP) McLaren MCL33 at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Mark Sutton/Sutton Images
Kimi Raikkonen (FIN) Ferrari SF-71H at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Mark Sutton/Sutton Images
Carlos Sainz jr (ESP) Renault Sport F1 Team RS18 at Formula One Testing, Day Four, Barcelona, Spain, 9 March 2018. © Mark Sutton/Sutton Images
Watch F1 TV