LONDON, ENGLAND - JULY 08: Novak Djokovic, Jelena Ristic, Jeremy Piven and Richard Branson attend the Novak Djokovic Foundation inaugural London gala dinner at The Roundhouse on July 8, 2013 in ... more 
LONDON, ENGLAND - JULY 08: Novak Djokovic, Jelena Ristic, Jeremy Piven and Richard Branson attend the Novak Djokovic Foundation inaugural London gala dinner at The Roundhouse on July 8, 2013 in London, England. The foundation supports vulnerable and disadvantaged children, especially in Djokovic's native Serbia. (Photo by Tim P. Whitby/Getty Images for Novak Djokovic Foundation) less 
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Getty Images | Photo By Tim P. Whitby / Getty Images for Novak Djokovic
Tue, Jul 9, 2013 4:00 AM EDT