ESPNF1 Columnist

February 4, 2013: Toro Rosso technical director James Key says his team has focused on the fundamentals this year rather than getting carried away with too many elaborate systems

February 4, 2013: Lewis Hamilton says he is "pushing already" at Mercedes and admits he is happier than he was at McLaren

February 4, 2013: Force India has confirmed that Jules Bianchi will get time to test the team's new VJM06 this week at Jerez

February 4, 2013: Toro Rosso has unveiled the STR8 at Jerez on the eve of the start of pre-season testing

February 4, 2013: Ross Brawn has defended the number of high-profile Mercedes technical staff, saying the current structure is necessary in order to run two parallel projects on the 2013 car and 2014 car

February 4, 2013: Nico Rosberg is targeting victories with the W04 this season but admits they are likely to come later in the year for Mercedes

February 4, 2013: Lewis Hamilton has described the launch of the Mercedes W04 as "the start of a new chapter" in his career

February 4, 2013: Mercedes team principal Ross Brawn says the W04 is "a clear step forward in design" compared to last year's car

February 4, 2013: Watch live coverage of the Mercedes W04 being launched at Jerez

February 4, 2013: Pirelli motorsport director Paul Hembery says the first test at Jerez will be "crucial" for the teams to understand the 2013 tyres

February 4, 2013: Mercedes has launched its new car - the W04 - during a filming day at the Jerez circuit

February 4, 2013: We look ahead to the start of testing as the Formula One paddock arrives in Jerez with ten new cars and some new driver line-ups