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MELBOURNE, AUSTRALIA - JANUARY 16: Tennys Sandgren of the United States plays a forehand in his first round match against Jeremy Chardy of France on day two of the 2018 Australian Open at Melbourne Park on January 16, 2018 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 16:  Tennys Sandgren of the United States plays a forehand in his first round match against Jeremy Chardy of France on day two of the 2018 Australian Open at Melbourne Park on January 16, 2018 in Melbourne, Australia.  (Photo by Scott Barbour/Getty Images)