Hello and welcome to ESPN's live coverage of third and final practice from Shanghai.
This is the final opportunity for the team's to fine-tune their set-ups ahead of qualifying. Mercedes look strong going into this afternoon's session but, as we all know, they are now wary of the resurgent Ferrari.
I think yesterday proved Mercedes might have a clear run at pole this afternoon but the real concern for them will be the race pace displayed by Ferrari's Kimi Raikkonen in FP2. The Finn has looked quick and consistent this season in the SF15-T.
@HS: People are saying this a lot. It's only the third race of the season and as he said, he didn't want to be at another team that could help him finish second. He's joined a long-term programme at McLaren and we won't know if it was the right decision or not until next season at the earliest.
Personally, I'm very keen to see what Rosberg can do this weekend. He's been a bit anonymous compared to Hamilton this year - except from when he's been making a fool of himself in press conferences - and needs a strong weekend.
Conditions remain sunny, clear and dry - like yesterday.
@mfbull: You'd be surprised how much time snappers spend taking pictures of her. Or maybe you wouldn't be...
The session is under way and Vettel is the first man to dash out in that Ferrari, followed by a Manor.
@FlyingFinn: There is a growing consensus that the best way forward is the short style of nose pioneered by Williams - but that design causes complications in passing the mandatory crash tests. The reasoning behind it are the aerodynamic benefits a shorter nose brings, you've got to think about the air flow.
@mfbull: Yes, they're in the order of the constructors' championship of the year before, hence Mercedes' position at the top of the pit lane and Manor's at the end
Good morning Fernando. We have Alonso on track but there's already a puff of blue smoke coming from the back of his McLaren - disastrous start for the Spaniard.
"I have a problem with the engine, I have to stop," says a sheepish Alonso.
@SammieSrini: On two occasions he's tried to make jokes (to Vettel in Australia and Hamilton in Malaysia) and both times the two men have made him look a bit silly. You can tell his usually cool demeanour is taking a hit this year.
The other McLaren of Button is currently circulating. McLaren has a real chance of making Q2 this afternoon so Alonso's troubles in this session will be a real blow.
Interesting message from McLaren to Button: "Problem is not fixed, Jenson. Problem is not fixed."
Remember, it's a marathon not a sprint for McLaren. They're still running things conservatively remember.
@rockedin123: It's always hard to tell as Williams does something completely different to the rest on Fridays. I can't remember the last time Williams looked decent pace-wise on a Friday. I expect to see it as close as it was in Melbourne, if I'm honest, as Malaysia is a track which really doesn't suit Williams.
One of the strengths of Allison's SF15-T is its cooling package, but also the fact it is very easy on the tyres. In Malaysia this was crucial as Vettel was able to do a two-stop strategy while Mercedes struggled with deg. This is a cooler circuit and that strength is negated slightly.
Ericsson plonks himself top of the leader board with a formative time of 1:42.174,.
@TS: It is true. The problem facing McLaren is the engine penalties you get once you have used four power units. For them, turning the revs up fully brings a whole raft of new problems you face when you test the limits of the engine, so at the moment they are focused on making small gains rather than risky big leaps.
@Mary-Lou: Whenever Mercedes needs a new driver I would expect it to be Bottas.
Nasr has replaced team-mate Ericsson at the top of the board by 0.03s.