Aston Martin ran a reverse strategy to everyone else in the session, using the softs first and the mediums later, indicating a greater focus on race pace than qualifying performance.
Out comes the flag to bring practice to a close. Russell and Antonelli lead Norris and Piastri. Leclerc and Hamilton follow in a two-by-two formation. Bearman, Verstappen, Hulkenberg and Gasly complete the top 10.
Off goes Leclerc at the final corner. He understeers wide across the gravel on the outside of the corner, bouncing over the kerb and likely damaging the floor.
Antonelli improves and closes on Russell. The battle for Sprint Pole later on today could be interesting, as could the battle for third and the midfield, but the chasm between those two battles is huge.
Up to fourth for Norris with a time 0.959s back on Russell. Verstappen sets his first soft tyre time, and goes seventh, 1.8s off the pace. Mercedes appears to have an even greater advantage this weekend.
Points for Bearman last weekend, and he seems to be carrying this form forward, moving up to P5. But here come the two McLaren drivers, which could see the Haas driver drop a couple of positions.
Oh dear. Leclerc puts in his reply to Mercedes, and falls 0.792s shy of the benchmark. All laps completed within moments of each other for the top three, and that is a margin you could quite literally park a bus in.
Soft tyres time now as we head into the final 10 minutes of running. Russell lays a firm marked with his first soft-tyre effort, putting in a 1m32.807s. Antonelli goes within 0.156s of his Mercedes team-mate.
Colapinto has oddly stopped in the pit lane, forcing yellow flags to fly as the Alpine mechanics sprint to recover the car. But just before they get to the car, he manages to get it going. However, with the mechanics having run away, there's no one at the garage to receive him. Very strange.
The Red Bull garage is likely a very interesting place right now, with Hadjar P11 and Verstappen P12. Both are over 1.7s back on Russell.
Whether it's because of the new powertrains or some other reason, drivers continue to run wide and suffer snaps under braking. It's very difficult to determine what is driver error and what is the car right now.
Good news for Williams, Sainz is on the track!
Here come the timed efforts. Hamilton leapt up to P3 but has just been replaced by Piastri. Medium tyres are still the option of choice, with Hamilton the only non-Aston Martin driver on softs, this down to his spin earlier in the session.
The problem for Sainz and Williams is reportedly a data issue, with his car not talking to everything it needs to. The Spaniard is sitting in his car just waiting to head out onto the track, but this is time that he will be unable to regain.
Halfway through the session, and here is the top 10.
- Russell 1m34.169s
- Leclerc +0.240s
- Antonelli +0.625s
- Bearman +0.781s
- Hamilton +0.816s
- Piastri +0.951s
- Norris +1.403s
- Gasly +1.470s
- Lawson +1.487s
- Ocon +1.612s
After flatspotting his mediums, Hamilton fits the softs and jumps to fifth. He's now 0.816s behind Russell, and one place behind Bearman's Haas.
The post sounds positive, but Sainz remains in the garage. Williams endured a difficult Australian Grand Prix, and this is far from ideal as we near the mid-point of the session. Team Principal James Vowles has indicated that they could solve all of their weight issues tomorrow if money were no issue, but these continuing problems cannot just be handwaved away.
The moment Lindblad's weekend took a turn for the worse.
We're now into a period of race simulations for most teams. But Alonso has the softs on and sets his best lap of the session, going to P17 and 4.410s off Russell's pace.
As Lindblad slowed to a stop, smoke could be seen coming from the cockpit. It's unclear what the fault was, but it's possible that the extinguisher went off in his car. As a safety issue, that is something that means drivers are forced to stop as soon as possible.
The yellow flags fly again, and this could well be a red, as Lindblad pulls off the track at the Turn 14 hairpin. The Virtual Safety Car is deployed as he climbs out of the car.
Back to green flag running and we continue as we were. Alonso and Saiz remain in the garages having only completed installation laps, while Stroll is the slowest of those with a time, 8.945s off the pace.
Antonelli was about to retake his position at the top of the timings before the Virtual Safety Car is displayed to allow for debris to be recovered from the long back straight.
10 minutes into the session and we turn to the timing screens for the first time today, as George Russell moves ahead of Mercedes team-mate Kimi Antonelli with a 1m35.065s effort. Leclerc is third and Gasly fourth.
Not a great few corners for Hamilton, who sweeps around the outside of the final corner on Lando Norris and makes floor-to-tyre contact with the McLaren, before spinning at Turn 6 and badly flat-spotting his medium tyres. With severely limited tyres this weekend, that could be hugely detrimental for his day.

