Australian Open

MELBOURNE, AUSTRALIA - JANUARY 21: Milos Raonic of Canada serves in his fourth round match against Roger Federer of Switzerland during day eight of the 2013 Australian Open at Melbourne Park on January 21, 2013 in Melbourne, Australia. (Photo by Quinn Rooney/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 21: Milos Raonic of Canada serves in his fourth round match against Roger Federer of Switzerland during day eight of the 2013 Australian Open at Melbourne Park on January 21, 2013 in Melbourne, Australia. (Photo by Quinn Rooney/Getty Images)