LONDON, ENGLAND - JUNE 23: Serbian Novak Djokovic returns the ball during the Gentlemen's Singles 2nd round match between Novak Djokovic and Kazakhstani Andrey Golubev (not seen) during the Wimbledon Lawn Tennis Championship at the All England Lawn Tennis and Croquet Club at Wimbledon on June 23, 2014 in London, England. (Photo by Yunus Kaymaz/Anadolu Agency/Getty Images)
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