MELBOURNE, AUSTRALIA - JANUARY 17: Nikolay Davydenko of Russia plays a backhand in his second round match against Roger Federer of Switzerland during day four of the 2013 Australian Open at Melbourne... more 
MELBOURNE, AUSTRALIA - JANUARY 17: Nikolay Davydenko of Russia plays a backhand in his second round match against Roger Federer of Switzerland during day four of the 2013 Australian Open at Melbourne Park on January 17, 2013 in Melbourne, Australia. (Photo by Quinn Rooney/Getty Images) less 
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Getty Images | Photo By Quinn Rooney / Getty Images
Thu, Jan 17, 2013 4:00 AM EST