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MELBOURNE, AUSTRALIA - JANUARY 17: Nick Kyrgios of Australia celebrates winning match point in his second round match against Viktor Troicki of Serbia on day three of the 2018 Australian Open at Melbourne Park on January 17, 2018 in Melbourne, Australia. (Photo by Clive Brunskill/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 17:  Nick Kyrgios of Australia celebrates winning match point in his second round match against Viktor Troicki of Serbia on day three of the 2018 Australian Open at Melbourne Park on January 17, 2018 in Melbourne, Australia.  (Photo by Clive Brunskill/Getty Images)