Lotus team radiopublished at 12:34 British Summer Time 11 October 2015
Engineer to Pastor Maldonado: "Pastor, confirming that Romain is absolutely fine. He walked away, no problem."
Hamilton wins, Vettel 2nd, Perez 3rd
Mercedes win constructors' title after Raikkonen penalised
Bottas and Raikkonen collide last on lap
Rosberg out after throttle problem
Battling Sainz out after brake failure
Grosjean suffers heavy crash - out
Hulkenberg, Ericsson, Ricciardo, Bottas out
Gary Rose
Engineer to Pastor Maldonado: "Pastor, confirming that Romain is absolutely fine. He walked away, no problem."
Replays highlight just how big a crash that was, the Lotus flying into the barrier at high speed. Romain Grosjean was walking a little gingerly after he stepped out, a little winded perhaps, but otherwise OK.
Kimi Raikkonen is informed over team radio that they think Romain Grosjean went off as a result of going over the marbles - little bits of rubber from off the tyres - on the track.
Fernando Alonso, Jenson Button and Robert Merhi are among the drivers to have pitted.
David Coulthard
BBC F1 co-commentator
"Grosjean starts to lose the rear of the car, it takes him onto the marbles and then he's on a one-way ticket to that barrier."
Romain Grosjean climbs out of the damaged Lotus. Lewis Hamilton and Valtteri Bottas stay out, as do a couple of the others towards the front of the field, with several cars further down the pack heading into the pits.
Lap 13
Romain Grosjean has crashed. The Lotus is into the barrier at Turn 3. He is moving in the car, which is good to see.
Mercedes: Initial analysis; as far as we can tell, the throttle damper has failed on @nico_rosberg, external's car.
Back to matters on the track and Lewis Hamilton holds a three-second lead over Valtteri Bottas.
Danny Palmer: Rosberg's car fails again. I hate to say it but Hamilton's car needs to fail too to give us an interesting race and championship
Dan Parkin: Gutted for Nico Rosberg after driving superbly all weekend. Slim hopes of the championship for him now definitely over.
What must Nico Rosberg be thinking? He has had some rotten luck. All he can do now is watch on as his title hopes appear to evaporate.
Lewis Hamilton is informed of Rosberg's plight: "Your team-mate has retired. Let's focus on this race."
David Coulthard
BBC F1 co-commentator
"You have to feel for Nico. He did everything so far this weekend and in the end he is left with his thoughts of what could have been."
Nico Rosberg limps back to the pits and his Mercedes is switched off. He is out of the race.
If Lewis Hamilton wins this, he will lead by 73 points, with just 100 to play for.
Ben Edwards
BBC F1 commentator
"It looks like it's all over in terms of the world championship."
Lewis Hamilton leads! Nico Rosberg is struggling with that throttle issue and runs wide at Turn 2, Hamilton pounces and moves to the front of the pack. Now Rosberg is passed by Valtteri Bottas.
Big problems for Rosberg and a big blow to his championship hopes!
Dan Smith: Imagine driving a Formula 1 car with a broken throttle, how is he meant to concentrate if he's worried about it sticking?
Charli: Bottas is, without doubt, a future champion.