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MELBOURNE, AUSTRALIA - JANUARY 19: Agnieszka Radwanska of Poland wipes her face in her second round match against Mirjana Lucic-Baroni of Croatia on day four of the 2017 Australian Open at Melbourne Park on January 19, 2017 in Melbourne, Australia. (Photo by Mark Kolbe/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 19:  Agnieszka Radwanska of Poland wipes her face in her second round match against Mirjana Lucic-Baroni of Croatia on day four of the 2017 Australian Open at Melbourne Park on January 19, 2017 in Melbourne, Australia.  (Photo by Mark Kolbe/Getty Images)