Only two days of testing for new machine means Mexican thinks team is underprepared for F1 opener.
Early super-soft run means Williams packs up early, with Mercedes content to shield its pace advantage once again.
Last day of Formula One pre-season testing, and super-soft ‘qualifying simulation’ runs dominate the timesheets.
No solution in sight to Nurburgring nor Hockenheim dilemmas over commercial deal for 2015 event.
Day three of test ends with the World Champion outpacing the pack, despite running a harder tyre.
Vettel admits Rosberg's time on soft tyres was "awesome" as World Champions show their hand.
Team rules out mechanical failure as the cause of accident during the final day of testing at Barcelona on Sunday.
Fernando Alonso's testing crash in his new McLaren-Honda has triggered wild speculation about the cause.
Kate Walker is your guide to a team-by-team run-down of what happened on the final day of the first official Formula One test at Barcelona in Spain.
Lotus ends second Formula One test of the season on top, but Alonso crash grabs all the headlines.
Spanish Formula One ace taken for medical checks after accident in new McLaren-Honda.
Two-time champion puts McLaren into top five before shunt ends promising run.
Former world champion puts a brave face on Honda struggles.
Kate Walker is your guide to a team-by-team run-down of what happened on the third day of official Formula One testing at Barcelona in Spain.
Toro Rosso rookie sets the pace on super-soft tyres, and is well clear of the pack.