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LONDON, ENGLAND - JULY 02: Novak Djokovic of Serbia speaks to the media following his defeat against Sam Querrey of the United States on day six of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 2, 2016 in London, England. (Photo by Pool/Getty Images)

LONDON, ENGLAND - JULY 02:  Novak Djokovic of Serbia speaks to the media following his defeat against Sam Querrey of the United States on day six of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 2, 2016 in London, England.  (Photo by Pool/Getty Images)