LONDON, ENGLAND - JUNE 23: Novak Djokovic of Serbia in a practice session during previews for Wimbledon Championships at Wimbledon on June 23, 2013 in London, England. (Photo by Julian Finney/Getty ... more 
LONDON, ENGLAND - JUNE 23: Novak Djokovic of Serbia in a practice session during previews for Wimbledon Championships at Wimbledon on June 23, 2013 in London, England. (Photo by Julian Finney/Getty Images) less 
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Getty Images | Photo By Julian Finney / Getty Images
Sun, Jun 23, 2013 9:07 AM EDT