MELBOURNE, AUSTRALIA - JANUARY 23: Ana Ivanovic of Serbia during her third round loss to Madison Keys of USA during day six of the 2016 Australian Open at Melbourne Park on January 23, 2016 in Melbourne, Australia. (Photo by Pat Scala/Getty Images)
MELBOURNE, AUSTRALIA - JANUARY 23: Ana Ivanovic of Serbia during her third round loss to Madison Keys of USA during day six of the 2016 Australian Open at Melbourne Park on January 23, 2016 in Melbourne, Australia. (Photo by Pat Scala/Getty Images)