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LONDON, ENGLAND - JULY 16: Roger Federer of Switzerland plays a backhand during the Gentlemen's Singles final against Marin Cilic of Croatia on day thirteen of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on July 16, 2017 in London, England. (Photo by Daniel Leal-Olivas - Pool/Getty Images)