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Williams Martini Racing's Finnish driver Valtteri Bottas walks back to his garage after the third practice session for the Formula One Australian Grand Prix in Melbourne on March 14, 2015. AFP PHOTO / William WEST --IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE-- (Photo credit should read WILLIAM WEST/AFP via Getty Images)

Williams Martini Racing's Finnish driver Valtteri Bottas walks back to his garage after the third practice session for the Formula One Australian Grand Prix in Melbourne on March 14, 2015.    AFP PHOTO / William WEST   
--IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE--        (Photo credit should read WILLIAM WEST/AFP via Getty Images)