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MELBOURNE, AUSTRALIA - JANUARY 24: Garbine Muguruza of Spain looks on in her quarterfinal match against CoCo Vandeweghe of the United States on day nine of the 2017 Australian Open at Melbourne Park on January 24, 2017 in Melbourne, Australia. (Photo by Clive Brunskill/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 24:  Garbine Muguruza of Spain looks on in her quarterfinal match against CoCo Vandeweghe of the United States on day nine of the 2017 Australian Open at Melbourne Park on January 24, 2017 in Melbourne, Australia.  (Photo by Clive Brunskill/Getty Images)