Overview
- Marini posted a 1:30.809 on his final lap to head the session by 0.136 seconds over KTM's Pedro Acosta.
- Aprilia's Marco Bezzecchi took third without changing from a hard front and medium rear during the 45-minute run.
- Yamaha's Alex Rins briefly led while lapping on 22-lap-old tyres, a reading later verified by the official classification.
- Ducati Lenovo's Marc Marquez finished fifth as team-mate Francesco Bagnaia ended 17th in the morning times.
- Gresini's Fermin Aldeguer suffered the only crash and was unhurt, with the afternoon practice set to determine direct Q2 qualifiers.