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MELBOURNE, AUSTRALIA - JANUARY 20: Sam Querrey of the United States plays a forehand in his third round match against Andy Murray of Great Britain on day five of the 2017 Australian Open at Melbourne Park on January 20, 2017 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 20:  Sam Querrey of the United States plays a forehand in his third round match against Andy Murray of Great Britain on day five of the 2017 Australian Open at Melbourne Park on January 20, 2017 in Melbourne, Australia.  (Photo by Scott Barbour/Getty Images)