Serbia's Novak Djokovic celebrates following his win over France's Nicholas Mahut in their third-round match at the Australian Open, in Melbourne, Australia, Saturday, Jan. 21, 2012. (AP Photo/John Donegan)
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Serbia's Novak Djokovic celebrates following his win over France's Nicholas Mahut in their third-round match at the Australian Open, in Melbourne, Australia, Saturday, Jan. 21, 2012. (AP Photo/John Donegan)
