Britain's Prince William and Kate, Duchess of Cambridge, applaud after Novak Djokovic of Serbia defeated Roger Federer of Switzerland in the men's singles final at the All England Lawn Tennis Championships in Wimbledon, London, Sunday July 6, 2014. (AP Photo/Sang Tan, Pool)

Britain Wimbledon Tennis

Britain's Prince William and Kate, Duchess of Cambridge, applaud after Novak Djokovic of Serbia defeated Roger Federer of Switzerland in the men's singles final at the All England Lawn Tennis Championships in Wimbledon, London, Sunday July 6, 2014. (AP Photo/Sang Tan, Pool)

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