Formula 1’s relocated Bahrain Grand Prix returned to Sepang International Circuit in Malaysia, where the weekend was set to be shaped by heat, humidity, rain risk and tyre wear rather than outright pace. Temperatures were forecast to hover around 32C on Friday and Saturday and 31C on Sunday, with rain possible on all three days and the highest chance on Friday. The FIA declared a Heat Hazard for Sunday, saying the heat index could rise above 31C, which will require extra driver-cooling equipment and a higher minimum car weight.
Sepang had not hosted Formula 1 since 2017, and teams arrived with little current data and none of the present cars having raced there before. Pirelli brought the C2, C3 and C4 compounds in an effort to widen strategy options and reduce the gap between one-stop and two-stop races, but drivers and engineers still expected tyre overheating, heavy degradation and difficult energy deployment on the abrasive 5.543-km circuit. Fernando Alonso, George Russell and Carlos Sainz all pointed to those challenges, while Isack Hadjar said heavy rain would be hard to trust with the new wet and intermediate tyres. Williams chief trackside engineer Paul Williams said Friday practice would be especially important because of the heat, humidity above 80 percent, possible thunderstorms and limited relevant data.
Opening practice was completed in hot, humid conditions, with Max Verstappen fastest in FP1 ahead of George Russell. Isack Hadjar was third, followed by Charles Leclerc, Kimi Antonelli and Lewis Hamilton, while McLaren had a muted start with Oscar Piastri 11th and Lando Norris 12th. FP2 was due to start at 16:00 local time, but was under threat from heavy rain chances and strong winds around the circuit, adding to the uncertainty for teams preparing for qualifying simulations and longer race runs.
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