The big battle now is for third. Acosta still heads Mir and Bezzecchi, but he feels a little bit like a cork in the bottle at this stage. He was the slowest of that trio last time around, though not by much.
Half distance and Bagnaia's lead is stable around 3.7s. Marquez was fractionally faster than him last time around.
As it stands now, Marc Marquez will be the world champion.
Still no movement for Alex Marquez in seventh. He's about 1.7s down on sixth-placed Franco Morbidelli.
Bagnaia leads at the start of lap 12, 3.7s clear of Marquez, who is 0.7s ahead of Acosta now.
Bezzecchi is looming in this battle for third ahead of him now.
That KTM has had a bit of an issue preserving tyres this year and it looks like that phase may have come for Acosta.
Marquez takes second from Acosta at Turn 3.
Bagnaia is now 3.4s clear of Bagnaia, while Marquez is close on Acosta now.
Again Marquez was a bit wide at Turn 10.
Bagnaia's lead is now 2.9s even before half distance. This has been vintage Bagnaia. Let's hope this is form that is back permanently now.
Marquez wide at Turn 10 but holds third.
Mir has been flashed a 'mapping 2' message on his dash, which will either be fuel management or traction control for tyre management.
Another lap down, no change at the front. Bagnaia has extended his advantage to 2.6s. Wow!
Outside of the top 10 is Binder, Di Giannantonio, Aldeguer, Bastianini and Miller for the final points places.
Alex Marquez hasn't advanced on seventh.
Onto lap eight now and Bagnaia's lead remains 2.1s from Acosta, who is 0.6s clear of Marquez.
Marquez was a bit hot into Turn 5 and that has put Mir right on his tail.
Bagnaia is in form today. He's already two seconds clear of the field.
Marquez said yesterday he was nervous in the sprint. And that looks like being the case right now. He looks like he is riding cautiously.
Bezzecchi was the fastest rider on track last time around.
Bagnaia extends his lead to 1.7s at the start of lap six over Acosta, while Marquez is being closed more by Mir.
Bezzecchi launches his Aprilia on Morbidelli at Turn 7 and gets fifth. That's an important move because he does have podium pace here.
We're on lap five now. Bagnaia's lead is up to 1.5s over Acosta, who still has Marquez behind him and Mir closing.
The fight for the race win already looks done.
Marini has now pitted.