MELBOURNE, AUSTRALIA - JANUARY 20: Roger Federer of Switzerland looks on in his third round match against Ivo Karlovic of Croatia during day five of the 2012 Australian Open at Melbourne Park on ... more 
MELBOURNE, AUSTRALIA - JANUARY 20: Roger Federer of Switzerland looks on 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 Clive Brunskill/Getty Images) less 
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Getty Images | Photo By Clive Brunskill / Getty Images
Thu, Jan 19, 2012 11:54 PM EST