Verstappen goes back to the top with a 1m28.116s. So, whatever his issue was in his first run, Red Bull has fixed it.
Chequered flag is out in Q2.
Antonelli improves to a 1m28.289s.
Mercedes has told Antonelli that there are gusts of 25km/h into Turn 11.
Norris asks: "Why do I have no deployment out of Turn 16?"
But his team says "deployment is correct" and suggests it could be the wind.
Norris posts a 1m29.040s, which is only good enough for ninth. He's 0.688s off the pace, but Lawson in 11th is about half a second behind right now.
But what will trouble him is that was a fresh soft for Norris.
Norris goes onto a flying lap.
We're seeing a very similar pattern to qualifying on Friday. Session-to-session showed quite a mixed up order at the sharp-end, with all four top teams showing good speed, but then it disappeared, as we've seen with Red Bull.
Norris does not have a lap on the board right now.
Antonelli, Hamilton, Russell, Leclerc, Piastri, Verstappen, Hadjar, Colapinto, Gasly and Lawson are you top 10 with eight minutes to go.
Antonelli takes over top spot with a 1m28.352s, while Russell is third on an identical 1m28.477s to Hamilton. That's a bit more like it from Mercedes!
Piastri up to third with a 1m28.902s.
Norris made a mistake on his first flying lap going into Turn 6.
Hamilton now fastest with a 1m28.477s from Leclerc, 0.065s splitting them.
There was a little bit of traffic for Verstappen on that lap. But it was also a scrappy lap - lots of drops in traction.
Verstappen goes top with a 1m28.931s. Hadjar only 0.010s behind him.
Pitlane has opened for Q2.
As always, the top 10 at the end of this session will progress to the pole shootout.
Antonelli set the benchmark in Q1 at 1m28.653s.
Q2 will start at 4:29pm local time, so in three minutes.
Aston Martin will be slightly encouraged by its performance in Q1. Both Alonso and Stroll beat both Cadillacs on pace, though Alonso was about a second away from 17th.
Q2 has been delayed while the stricken Audi is recovered.
What a difference a day makes for Bortoleto. He's was 11th in sprint qualifying. He'll start last for Sunday's grand prix.
Bortoleto's Audi is limping back to the pits with one of his brakes on fire.
That's two Audis suffering fires today!
Kimi Antonelli leads Q1 from Leclerc and Verstappen.
Lindblad, Alonso, Stroll, Bottas, Perez and Bortoleto drop out of Q1.
Piastri is safe into Q2, just.
Piastri now 16th! He's in real danger.
Lots of improvements. Piastri shuffled down to 14th. Leclerc has just gone second.
