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MELBOURNE, AUSTRALIA - JANUARY 29: Roger Federer of Switzerland kisses the Norman Brookes Challenge Cup after winning the Men's Final match against Rafael Nadal of Spain on day 14 of the 2017 Australian Open at Melbourne Park on January 29, 2017 in Melbourne, Australia. (Photo by Cameron Spencer/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 29:  Roger Federer of Switzerland kisses the Norman Brookes Challenge Cup after winning the Men's Final match against Rafael Nadal of Spain on day 14 of the 2017 Australian Open at Melbourne Park on January 29, 2017 in Melbourne, Australia.  (Photo by Cameron Spencer/Getty Images)