There were three practice sessions held in accordance with the 2010 regulations, two 90-minute sessions on Friday morning and afternoon and one 60-minute session on Saturday morning. Heavy rain fell on the circuit at about midnight before the first session. Although the track was wet, a decent level of
grip was reported as some drivers
aquaplaned when the rain briefly increased in intensity and lightning came approximately 50 minutes in; the rain abated with 20 minutes left. Alonso lapped fastest at 2:01.223 at mid-point before improving to a 2:00.797 late on. Hamilton, Renault's
Robert Kubica, Vettel, Sutil, Button, Webber,
Kamui Kobayashi of
Sauber, Williams'
Rubens Barrichello, and Mercedes'
Michael Schumacher made up positions two through ten. crashed during the second practice session The second session commenced on a damp circuit which gradually dried up bar a small rain shower early on. Drivers used wet-weather tyres before switching to the dry compounds. Alonso led with the day's fastest lap, a 1:49.032, ahead of Sutil, Hamilton, Kubica, Massa, Vettel, Button,
Pedro de la Rosa for Sauber, Barrichello and De la Rosa's teammate Kamui Kobayashi in positions two to ten. The session was stopped for ten minutes by the stewards for a safety hazard limiting dry track running. Children were reportedly climbing the catch fence on track grounds, forcing FIA race director
Charlie Whiting to drive the
safety car and do an inspection. While the session restarted with four minutes left, a malfunctioning red light delayed on-track action, requiring
marshals to wave a
green flag to resume proceedings. Conditions remained dry enough for drivers to go faster until a downpour fell on the circuit with 15 minutes remaining and caught out some participants. With a 1:46.106
lap being almost three seconds quicker than Friday's best time, Webber led from Hamilton, Vettel, Button, Kubica, Alonso, Massa, Sutil, Williams'
Nico Hülkenberg and Kobayashi. Vettel stopped his car at the pit lane entry with his car stuck in gear due to an air box fault prompting his team to instruct him to switch off the engine as a precaution. A group of marshals moved Vettel's car into the pit lane for retrieval by his team. ==Qualifying==