Follow live text commentary, images, social media and analysis from the second day of testing at Circuit de Catalunya.
Mercedes and Ferrari enjoy impressive starts to pre-season testing as Red Bull and McLaren hit trouble.
Lewis Hamilton loves his new car, Fernando Alonso is disappointed, Red Bull tried to get 'shark fins' changed, plus more.
Take a look at all of the F1 cars for 2017 as the teams prepare for the first race of the season in Australia on 26 March.
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Mercedes driver Valtteri Bottas says that there could be "sparks" between himself and team-mate Lewis Hamilton during the coming season.
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