ESPNF1 Columnist

February 24, 2012: Chief operations engineer Mark Gillan says Williams has enjoyed "an excellent couple of weeks" during pre-season testing

February 24, 2012: Mercedes has begun searching for performance from the W03 after learning how its new car works during the second test, according to team principal Ross Brawn

February 24, 2012: Kamui Kobayashi has warned not to read anything into his test-topping lap time at Barcelona on Friday

February 24, 2012: Martin Whitmarsh admits it's encouraging for McLaren that one team has not emerged as dominant during pre-season testing so far

February 24, 2012: Jean-Eric Vergne says that he is "much more confident" in the new Toro Rosso than he was after the first test in Jerez

February 24, 2012: Nico Rosberg believes this year's Mercedes W03 represents a big a step made by the team

February 24, 2012: Mark Webber has singled out McLaren as Red Bull's closest rivals after the conclusion of the second pre-season test

February 24, 2012: Felipe Massa believes Ferrari has finally found the right direction to develop the new F2012 and said he felt more comfortable in the car on Friday afternoon than he has at any point in pre-season testing

February 24, 2012: Kamui Kobayashi set the fastest time of the week as the second test at Barcelona came to a close on Friday

February 24, 2012: Read what the drivers and teams had to say after the fourth day of testing at Barcelona

February 24, 2012: Marussia had its test programme cut short after a suspension problem confined Charles Pic to the garage for the whole of Friday

February 24, 2012: Marussia has joined forces with Carlin to enter a GP2 team and strengthen its Young Driver Programme

February 24, 2012: Sam Bird will drive for I.S.R. in World Series by Renault this year, alongside his reserve duties for Mercedes

February 24, 2012: Kamui Kobayashi set the fastest time this week so far on the final morning of testing at the Circuit de Catalunya

February 24, 2012: Jenson Button talked to the media after his first day back in the car at the Barcelona test, touching on a variety of subjects from using tyres in cold temperatures to handing awards out at the Brits

February 24, 2012: Ferrari and Red Bull have altered their plans for the final pre-season test, allowing them to start and finish a day later than the other teams

February 23, 2012: Felipe Massa says the Ferrari F2012 is "definitely better" this week than it was at last test at Jerez

February 23, 2012: Red Bull is "still learning plenty" about the new RB8 after Mark Webber had his morning running limited by a gearbox problem

February 23, 2012: Jenson Button is confident McLaren will be closer to Red Bull at the start of this year than it was at the start of 2011