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MELBOURNE, AUSTRALIA - JANUARY 19: Jennifer Brady of the United States celebrates winning her second round match against Heather Watson of Great Britain on day four of the 2017 Australian Open at Melbourne Park on January 19, 2017 in Melbourne, Australia. (Photo by Jack Thomas/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 19:  Jennifer Brady of the United States celebrates winning her second round match against Heather Watson of Great Britain on day four of the 2017 Australian Open at Melbourne Park on January 19, 2017 in Melbourne, Australia.  (Photo by Jack Thomas/Getty Images)

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MELBOURNE, AUSTRALIA - JANUARY 19: Jennifer Brady of the United States serves in her second round match against Heather Watson of Great Britain on day four of the 2017 Australian Open at Melbourne Park on January 19, 2017 in Melbourne, Australia. (Photo by Jack Thomas/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 19:  Jennifer Brady of the United States serves in her second round match against Heather Watson of Great Britain on day four of the 2017 Australian Open at Melbourne Park on January 19, 2017 in Melbourne, Australia.  (Photo by Jack Thomas/Getty Images)

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Jennifer Brady of the US hits a return against Britain's Heather Watson during their women's singles second round match on day four of the Australian Open tennis tournament in Melbourne on January 19, 2017. / AFP / WILLIAM WEST / IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE (Photo credit should read WILLIAM WEST/AFP/Getty Images)

Jennifer Brady of the US hits a return against Britain's Heather Watson during their women's singles second round match on day four of the Australian Open tennis tournament in Melbourne on January 19, 2017. / AFP / WILLIAM WEST / IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE        (Photo credit should read WILLIAM WEST/AFP/Getty Images)

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MELBOURNE, AUSTRALIA - JANUARY 19: Jennifer Brady of the United States plays a backhand in her second round match against Heather Watson of Great Britain on day four of the 2017 Australian Open at Melbourne Park on January 19, 2017 in Melbourne, Australia. (Photo by Jack Thomas/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 19:  Jennifer Brady of the United States plays a backhand in her second round match against Heather Watson of Great Britain on day four of the 2017 Australian Open at Melbourne Park on January 19, 2017 in Melbourne, Australia.  (Photo by Jack Thomas/Getty Images)

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MELBOURNE, AUSTRALIA - JANUARY 17: Jennifer Brady of the United States looks on in her first round match against Johanna Larsson of Sweden on day two of the 2017 Australian Open at Melbourne Park on January 17, 2017 in Melbourne, Australia. (Photo by Michael Dodge/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 17:  Jennifer Brady of the United States looks on in her first round match against Johanna Larsson of Sweden on day two of the 2017 Australian Open at Melbourne Park on January 17, 2017 in Melbourne, Australia.  (Photo by Michael Dodge/Getty Images)