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LONDON, ENGLAND - JULY 06: Roger Federer of Switzerland (L) celebrates victory during the Men's Singles Quarter Finals match against Marin Cilic of Croatia (R) on day nine of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 6, 2016 in London, England. (Photo by Clive Brunskill/Getty Images)

LONDON, ENGLAND - JULY 06:  Roger Federer of Switzerland (L) celebrates victory during the Men's Singles Quarter Finals match against Marin Cilic of Croatia (R) on day nine of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 6, 2016 in London, England.  (Photo by Clive Brunskill/Getty Images)