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MELBOURNE, AUSTRALIA - JANUARY 17: Casper Ruud of Norway plays a forehand in his second round match against Diego Schwartzman of Argentina on day three of the 2018 Australian Open at Melbourne Park on January 17, 2018 in Melbourne, Australia. (Photo by Pat Scala/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 17:  Casper Ruud of Norway plays a forehand in his second round match against Diego Schwartzman of Argentina on day three of the 2018 Australian Open at Melbourne Park on January 17, 2018 in Melbourne, Australia.  (Photo by Pat Scala/Getty Images)