World number two tennis player Serbian Novak Djokovic returns the ball to Romanian Adrian Ungur during their match at ATP World Tour 250 tournament on April 27, 2011, in Belgrade. Djokovic won with a... more 
World number two tennis player Serbian Novak Djokovic returns the ball to Romanian Adrian Ungur during their match at ATP World Tour 250 tournament on April 27, 2011, in Belgrade. Djokovic won with a 6-2, 6-3. AFP PHOTO / ANDREJ ISAKOVIC (Photo credit should read ANDREJ ISAKOVIC/AFP/Getty Images) less 
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Getty Images | Photo By ANDREJ ISAKOVIC / AFP/Getty Images
Wed, Apr 27, 2011 4:24 PM EDT