January 25, 2012
Caroline Wozniacki serves in her quarter-final match against Kim Clijsters during day nine of the 2012 Australian Open, on January 24, 2012. (Ryan Pierse/Getty Images) #img 22 MORE/Source

Caroline Wozniacki serves in her quarter-final match against Kim Clijsters during day nine of the 2012 Australian Open, on January 24, 2012. (Ryan Pierse/Getty Images) #img 22 MORE/Source