LONDON, ENGLAND - JUNE 23: Novak Djokovic of Serbia in action during a practice session during previews for Wimbledon Championships at Wimbledon on June 23, 2013 in London, England. (Photo by Julian ... more 
LONDON, ENGLAND - JUNE 23: Novak Djokovic of Serbia in action during 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
Mon, Jun 24, 2013 7:53 AM EDT