Rosberg is now fastest with a 1:27.333. Hamilton is second on a 1:27.509.
A new rear suspension layout for McLaren. It's similar to the old design, which is unique in the pit lane and sees the rear arm of the wishbone connect much further back on the rear crash structure.
Alonso hangs the rear of his McLaren out around Turn 12. That could also have been a homage to Gilles Villeneuve with the way he collected it together again.
@MichaelBialocur: Renault attempted to make some performance gains over the winter but in doing it seems they so compromised reliability. They were not happy with the way the token system was changed over the winter as they had to rush some changes and then change their strategy when it became apparent that tokens could be spent at any point during the year. Ferrari seemed to be much better prepared and appeared to bank on the token system being changed.
The first 30 minutes of the session is up so the teams can no longer use their first set of tyres for the weekend. They now get another set of hards to finish this session before new sets of hard and medium compounds for FP2.
@altaf: Vettel has set a 1:28.141 and Raikkonen a 1:28.825.
@rockedin123: It's too early in the weekend to read too much into the time, but I suspect Mercedes will hold an advantage over Ferrari here.
@Heartmuscle: All these cars can hit well over 320km/h if you trim enough downforce, and therefore drag, off the car. The key is to have efficient downforce and that's what the teams aim for. Power allows you to run more downforce without compromising straight-line speed, but top speeds are not the best indicator of power.
@fawx: Don't forget all teams are wary of putting mileage on the engines, which are still limited to four under the regulations. That could increase to five, but until it does we could be set for a some quiet Fridays.
Stevens breaks the silence with the roar of a 2014-spec Ferrari engine and the Manor heads out on track.
@Blake187: No timed lap from Ricciardo so far. I suspect that is a problem with the car as he has effectively wasted the first set of tyres of the weekend. No news yet on the specifics...
Vettel has set a fastest first sector...
A little wobble for Vettel through Turn 9 and a personal best in sector two...
Hamilton is on a faster lap behind him though
Vettel improves to a 1:27.846, but Hamilton smashes that with a 1:26.898.
Rosberg also improves but can only manage a 1:27.043.
@sumanth: They have so far, but it will only get more and more difficult. The team admits it will only score from others' mistakes this weekend.
@@MifdhalAceh: Alonso's best time is a 1:29.813.
More trouble for Ricciardo as the engine cover comes off again. Clearly the team hasn't fixed the Red Bull's problems yet.