Bernoldi followed in positions four through ten. The ambient and track temperatures had increased by the start of the fourth practice session. Several competitors made driver errors sending them into the gravel. Michael Schumacher set the track lap record of 1 minute, 8.433 seconds. Barrichello was second, and Ralf Schumacher improved to third. Montoya, Frentzen, Massa, Heidfeld, Räikkönen, Panis and Villeneuve completed the top ten. Bernoldi missed 25 minutes due to a malfunctioning gearbox. He later lost control of the rear of his car at turn two and got beached in a gravel trap before the session ended. Qualifying Saturday's afternoon one-hour qualifying session saw each competitor limited to twelve laps, with the starting order decided by their fastest laps. The 107% rule was in effect during this session, requiring each driver set a time within 107 per cent of the quickest lap to qualify for the race. Conditions were clear with warm air and track temperatures. Barrichello took his second pole position of the season and the fifth of his career with a lap of 1 minute, 8.082 seconds. He was joined on the grid's front row by Ralf Schumacher, who took his best starting position of the year. Michael Schumacher was third; he said he lost speed due to a brake problem, and traffic slowed him. He switched to the spare Ferrari for his final timed lap in an unsuccessful attempt to claim pole position, and did not earn a front-row start for the first time since the 2001 Italian Grand Prix eight races earlier. A misfiring engine prompted Montoya in fourth to switch to the spare car setup for his teammate Ralf Schumacher; he made a minor tyre-pressure adjustment to record his fastest lap. Heidfeld took fifth, claiming he could have improved had Button not slowed his final timed lap. A lack of speed restricted the McLaren duo of Räikkönen and Coulthard to sixth and eighth; they were separated by Massa who made two driver errors in an unbalanced car through high-speed turns. Panis was ninth-fastest as de la Rosa slowed his final timed lap. Toyota's Mika Salo in tenth had a minor understeer. Frentzen in 11th spun on oil and removed some bodywork components from his car in a gravel trap. His vehicle was later repaired to continue driving. His Arrows' teammate Bernoldi followed in 12th and expressed satisfaction with his car's balance. Traffic slowed Button