Chequered flag is out.
Acosta has crashed at Turn 2 after the flag while cruising.
Marc Marquez holds onto top spot with a 1m37.295s as Fabio Di Giannantonio leaps up to second late on.
Bagnaia holds onto 10th and is safe in Q2.
Yellow flags in the first sector briefly may well just help Bagnaia.
Bagnaia pushed down to ninth by Binder and Zarco. Just under a minute to go!
That lap pushes Bagnaia down to seventh and there is only 0.097s splitting Bagnaia from 10th-placed Morbidelli.
Quartararo jumps up to fifth without Bagnaia ahead of him, so fair play to the Yamaha rider.
Bagnaia has crashed at Turn 2! He's sixth currently but that could be a disaster for his Q2 hopes.
Looks like Quartararo is doing something he never does and is picking Bagnaia to follow on his next flying lap to try to get into Q2. It has worked for Rins so far!
Marc Marquez retakes top spot with a 1m37.438s, while Alex Rins goes fourth using the Ducati as a reference. Alex Marquez moves up to third.
Bagnaia now fourth, 0.324s off the pace. That should just about be enough to get into the top 10 but it won't be comfortable with just over 12 minutes to go.
Bagnaia moves up to sixth, with Binder fifth using the Ducati rider as a reference.
Marco Bezzecchi sets a new lap record with a 1m37.510s on the Aprilia to go fastest of all.
- M.Marquez
- Acosta
- Bezzecchi
- Zarco
- A.Marquez
- Mir
- Morbidelli
- Vinales
- Di Giannantonio
- Bagnaia
Pedro Acosta jumps up to second with a 1m37.827s on a new soft rear tyre. Joan Mir goes sixth on fresh rubber.
Quite a few riders in pitlane now with just over 20 minutes to go. Things are about to heat up at Termas!
Zarco has gone down at Turn 2. Fast spill but he's up and on his feet.
Bezzecchi will be setting up for an early time attack now, according to his Aprilia team's live radio communication inside the garage.
Marco Bezzecchi cuts Marquez's advantage to 0.181s as he puts the Aprilia into second.
Big improvement for Joan Mir, who moves up to seventh, while Maverick Vinales puts his Tech3 KTM 10th.
- M.Marquez
- Zarco
- Bezzecchi
- A.Marquez
- Acosta
- Morbidelli
- Bagnaia
- Di Giannantonio
- Binder
- Quartararo
Expert analysis: the silver on the Gresini leathers and bike fairings looks really good at speed.
Marquez has spread the field a bit right now. Pedro Acosta has just moved up to fifth on the KTM, but he's almost 0.7s adrift.
Back-to-back 1m37s for Marquez on this run so far.