Novak Djokovic from Serbia gestures during the match against Grigor Dimitrov from Russia at the Madrid Open tennis tournament, in Madrid, Tuesday, May 7, 2013. (AP Photo/Andres Kudacki)

Associated Press
Novak Djokovic from Serbia gestures during the match against Grigor Dimitrov from Russia at the Madrid Open tennis tournament, in Madrid, Tuesday, May 7, 2013. (AP Photo/Andres Kudacki)
Novak Djokovic from Serbia gestures during the match against Grigor Dimitrov from Russia at the Madrid Open tennis tournament, in Madrid, Tuesday, May 7, 2013. (AP Photo/Andres Kudacki)
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