MELBOURNE, AUSTRALIA - JANUARY 22: Roger Federer of Switzerland celebrates in his third round match against Grigor Dimitrov of Bulgaria during day five of the 2016 Australian Open at Melbourne Park on January 22, 2016 in Melbourne, Australia. (Photo by Michael Dodge/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 22:  Roger Federer of Switzerland celebrates in his third round match against Grigor Dimitrov of Bulgaria during day five of the 2016 Australian Open at Melbourne Park on January 22, 2016 in Melbourne, Australia.  (Photo by Michael Dodge/Getty Images)