MELBOURNE, AUSTRALIA - JANUARY 20: Ana Ivanovic of Serbia plays a forehand in her fourth round match against Agnieszka Radwanska of Poland during day seven of the 2013 Australian Open at Melbourne ... more 

MELBOURNE, AUSTRALIA - JANUARY 20: Ana Ivanovic of Serbia plays a forehand in her fourth round match against Agnieszka Radwanska of Poland during day seven of the 2013 Australian Open at Melbourne Park on January 20, 2013 in Melbourne, Australia. (Photo by Robert Prezioso/Getty Images) less