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LONDON, ENGLAND - JULY 03: An injured Nick Kyrgios of Australia shakes hands with Pierre-Hugues Herbert of France as he retires during the Gentlemen's Singles first round match on day one of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 3, 2017 in London, England. (Photo by Shaun Botterill/Getty Images)

LONDON, ENGLAND - JULY 03:  An injured Nick Kyrgios of Australia shakes hands with Pierre-Hugues Herbert of France as he retires during the Gentlemen's Singles first round match on day one of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 3, 2017 in London, England.  (Photo by Shaun Botterill/Getty Images)