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Sauber - Ferrari driver Sergio Perez of Mexico slides off the track during the third practice session for Formula One's Australian Grand Prix in Melbourne on March 17, 2012. The opening race of the 2012 season will be held at the 5.3km Albert Park road circuit on March 18. AFP PHOTO/William WEST (Photo credit should read WILLIAM WEST/AFP/Getty Images)

Sauber - Ferrari driver Sergio Perez of Mexico slides off the track during the third practice session for Formula One's Australian Grand Prix in Melbourne on March 17, 2012.  The opening race of the 2012 season will be held at the 5.3km Albert Park road circuit on March 18.  AFP PHOTO/William WEST (Photo credit should read WILLIAM WEST/AFP/Getty Images)