McLaren’s Lando Norris set the pace in practice at the United States Grand Prix, split from team-mate and title rival Oscar Piastri by Sauber’s Nico Hulkenberg.
Norris, trailing the Australian by 22 points with six races to go, headed Piastri by 0.279 seconds at the start of a sprint weekend at the Circuit of the Americas.
Aston Martin’s Fernando Alonso was fourth fastest, ahead of Red Bull’s Max Verstappen and Williams’ Alex Albon.
This was the only session before sprint qualifying at 22:30 BST.
Mercedes’ George Russell was seventh fastest, the first driver to set his fastest time on the medium tyres, ahead of Ferrari’s Lewis Hamilton, Racing Bulls’ Isack Hadjar and Haas’ Oliver Bearman.
