Oscar Piastri stormed clear of his rivals in final practice for the Spanish Grand Prix as McLaren completed a hat trick of fastest times before qualifying.
Piastri, who was also fastest in FP2, was half a second quicker than Lando Norris on Saturday with his 1:12.387. Norris went wide on his fastest lap.
Charles Leclerc was third, but seven-tenths of a second off the pace, just ahead of George Russell. Lewis Hamilton was only ninth in the other Ferrari and complained of gearshift issues late on in the session.
Red Bull's reigning champion Max Verstappen was fifth, ahead of rookies Isack Hadjar and Kimi Antonelli. Local hero and double world champion Fernando Alonso was eighth for Aston Martin but 1.027 slower than Piastri.
Hamilton was next and complained on team radio: "Downshifts are not working properly, mate. Something's wrong with the gear shift." Hamilton complained that the Ferrari was "not drivable" on Friday.
Liam Lawson completed the top 10 for Racing Bulls ahead of qualifying for Sunday's race.