MELBOURNE, AUSTRALIA - JANUARY 22: Na Li of China serves in her Quarterfinal match against Agnieszka Radwanska of Poland during day nine of the 2013 Australian Open at Melbourne Park on January 22, ... more 

MELBOURNE, AUSTRALIA - JANUARY 22: Na Li of China serves in her Quarterfinal match against Agnieszka Radwanska of Poland during day nine of the 2013 Australian Open at Melbourne Park on January 22, 2013 in Melbourne, Australia. (Photo by Julian Finney/Getty Images) less