MELBOURNE, AUSTRALIA - JANUARY 22: Agnieszka Radwanska of Poland returns a shot in her third round match against Monica Puig of Puerto Rico during day five of the 2016 Australian Open on January 22, 2016 in Melbourne, Australia (Photo by Recep Sakar/Anadolu Agency/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 22:  Agnieszka Radwanska of Poland returns a shot in her third round match against Monica Puig of Puerto Rico during day five of the 2016 Australian Open  on January 22, 2016 in Melbourne, Australia (Photo by Recep Sakar/Anadolu Agency/Getty Images)