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MELBOURNE, AUSTRALIA - JANUARY 20: Thiago Agustin Tirante of Argentina plays a forehand against Sergey Fomin of Uzbekistan during the Australian Open 2018 Junior Championships at Melbourne Park on January 20, 2018 in Melbourne, Australia. (Photo by Pat Scala/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 20:  Thiago Agustin Tirante of Argentina plays a forehand against Sergey Fomin of Uzbekistan during the Australian Open 2018 Junior Championships at Melbourne Park on January 20, 2018 in Melbourne, Australia.  (Photo by Pat Scala/Getty Images)