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MELBOURNE, AUSTRALIA - JANUARY 23: Roger Federer of Switzerland speaks at a press conference after losing in his third round match against Andreas Seppi of Italy during day five of the 2015 Australian Open at Melbourne Park on January 23, 2015 in Melbourne, Australia. (Photo by Vince Caligiuri/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 23:  Roger Federer of Switzerland speaks at a press conference after losing in his third round match against Andreas Seppi of Italy during day five of the 2015 Australian Open at Melbourne Park on January 23, 2015 in Melbourne, Australia.  (Photo by Vince Caligiuri/Getty Images)