First 2015 Barcelona test in pictures

The second winter test of the F1 2015 season took place from the 19-22 February at the Circuito de Barcelona-Catalunya.

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It was a busy and interesting four-day event, with Lotus driver Romain Grosjean setting the fastest time.

For all of the combined times and lap counts, go here.

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Felipe Nasr, Pascal Wehrlein and Susie Wolff were the first drivers out on track on the opening day of the test.

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Mercedes reserve driver Wehrlein started the day driving for Force India.

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Pastor Maldonado brought out the first red flag of the day after a reliability problem, but despite the issues he still ended the day fastest.

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Lewis Hamilton was suffering from a fever and could only manage 11 laps, before Wehrlein switched from Force India to Mercedes to complete the day.

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Nasr and Wolff collided at turn five, bringing out another red flag. Despite the damage, both drivers returned to the track before the end of the day.

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Carlos Sainz Jr caused a red flag on day two of the test after spinning into the gravel at turn nine.

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Jolyon Palmer made his debut as the Lotus F1 Team's reserve driver on Friday, completing 77 laps.

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Daniel Ricciardo ended Friday fastest for Red Bull and completed a full race simulation.

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Sebastian Vettel suffered an early spin in the opening minutes of day three, but quickly returned to the track.

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Light drizzle over the lunch break meant some drivers ventured out onto the circuit in the afternoon on intermediate tyres.

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Maldonado was fastest once again at the wheel of the Lotus E23.

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Nico Rosberg found the gravel after a spin in the early stages of day four.

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Nasr stopped at the end of the pit lane in the morning session, losing a considerable amount of track time while Sauber fixed the reliability problems.

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The morning session was cut short after Fernando Alonso crashed at turn three. He was taken to hospital for checks and stayed overnight, but McLaren confirmed that he is okay.

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Romain Grosjean got his first taste of driving the E23 at the Circuit de Barcelona-Catalunya on Sunday and went on to set the quickest time of the test.