MELBOURNE, AUSTRALIA - JANUARY 20: Roger Federer of Switzerland plays a backhand in his third round match against Ivo Karlovic of Croatia during day five of the 2012 Australian Open at Melbourne Park... more 
MELBOURNE, AUSTRALIA - JANUARY 20: Roger Federer of Switzerland plays a backhand in his third round match against Ivo Karlovic of Croatia during day five of the 2012 Australian Open at Melbourne Park on January 20, 2012 in Melbourne, Australia. (Photo by Cameron Spencer/Getty Images) less 
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Getty Images | Photo By Cameron Spencer / Getty Images
Thu, Jan 19, 2012 11:06 PM EST