Thursday 25 February 2016 17:59, UK
Sky F1's Ted Kravitz reviews the first pre-season test at Barcelona and assesses the current state of play.
After four days of running at the Circuit de Catalunya, who is on top and who is struggling?
Play the video at the top oft he page to learn Ted's verdict.
The second and final F1 pre-season test starts in Barcelona on Tuesday March 1 and the Sky Sports F1 Digital team will be providing live commentary from dawn until dusk on all four days while Sky Sports News HQ will also deliver live updates from trackside.
