February 1, 2015

Mercedes team-mates Nico Rosberg and world champion Lewis Hamilton ahead of the new car's launch

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February 1, 2015

Valtteri Bottas and Felipe Massa pose for the cameras at the launch of the FW37

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February 1, 2015

Nico Rosberg speaks to the media after the first day of 2015 testing

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February 1, 2015

McLaren's Fernando Alonso answers questions in front of the media

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February 1, 2015

Fernando Alonso decked out in McLaren colours in the Jerez paddock

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February 1, 2015

Lewis Hamilton looks at his helmet during the pit lane launch of the Mercedes W06 Hybrid

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February 1, 2015

Fernando Alonso on track in the McLaren

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February 1, 2015

Sebastian Vettel at speed in the Ferrari

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February 1, 2015

Fernando Alonso greets Mercedes advisor Niki Lauda in the Jerez paddock

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February 1, 2015

Nico Rosberg hits the apex in a Mercedes W06 Hybrid covered in aero paint

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February 1, 2015

Fans watch Nico Rosberg circulate in the title-defending W06 Hybrid

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February 1, 2015

Sebastian Vettel wearing his new helmet ahead of his first day in the Ferrari SF15-T

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February 1, 2015

Marcus Ericsson behind the wheel of the 2015 Sauber

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February 1, 2015

Fernando Alonso on track in the McLaren

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February 1, 2015

Fernando Alonso poses with Spanish supporters during the first day of testing

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February 1, 2015

Daniel Ricciardo on track in the striking RB11

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February 1, 2015

Valtteri Bottas rounds the apex in the FW37

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February 1, 2015

Carlos Sainz Jr waits to climb into the STR10 on Sunday

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February 1, 2015

Mercedes team-mates Nico Rosberg and world champion Lewis Hamilton pose for a selfie

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February 1, 2015

Daniel Ricciardo gets the power down in the RB11

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