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MELBOURNE, AUSTRALIA - JANUARY 27: Novak Djokovic of Serbia poses with the Norman Brookes Challenge Cup following victory in his Men's Singles Final match along side runner up Rafael Nadal of Spain during day 14 of the 2019 Australian Open at Melbourne Park on January 27, 2019 in Melbourne, Australia. (Photo by Julian Finney/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 27:  Novak Djokovic of Serbia poses with the Norman Brookes Challenge Cup following victory in his Men's Singles Final match along side runner up Rafael Nadal of Spain during day 14 of the 2019 Australian Open at Melbourne Park on January 27, 2019 in Melbourne, Australia. (Photo by Julian Finney/Getty Images)