Red Bull announced its dominance the moment its cars hit the track on Friday morning, with Sebastian Vettel and Mark Webber's first flying laps immediately putting them two seconds clear of the previous benchmarks.
Renault's Robert Kubica eventually got to within 1.096s, but that was the best Red Bull's rivals could manage as Vettel and Webber proceded to battle among themselves for the morning. The German ended up on top by 0.130 seconds.
Jenson Button was fourth for McLaren, ahead of strong runs from Williams' Rubens Barrichello and Sauber's Pedro de la Rosa. Felipe Massa was 12th after his first session back at the scene of his horrible 2009 accident.