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LONDON, ENGLAND - JULY 06: Michael Mmoh of the United States returns a shot in his Boy's Singles First Round match against Geoffrey Blancaneaux of France during day seven of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 6, 2015 in London, England. (Photo by Ian Walton/Getty Images)

LONDON, ENGLAND - JULY 06:  Michael Mmoh of the United States returns a shot in his Boy's Singles First Round match against Geoffrey Blancaneaux of France during day seven of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 6, 2015 in London, England.  (Photo by Ian Walton/Getty Images)