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MELBOURNE, AUSTRALIA - JANUARY 19: Roger Federer of Switzerland shakes hands at the net after his straight sets victory in his first round match against Yen-Hsun Lu of Chinese Taipei during day one of the 2015 Australian Open at Melbourne Park on January 19, 2015 in Melbourne, Australia. (Photo by Clive Brunskill/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 19:  Roger Federer of Switzerland shakes hands at the net after his straight sets victory in his first round match against Yen-Hsun Lu of Chinese Taipei during day one of the 2015 Australian Open at Melbourne Park on January 19, 2015 in Melbourne, Australia.  (Photo by Clive Brunskill/Getty Images)