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Novak Djokovic of Serbia celebrates winning after the men's singles final match against Rafael Nadal of Spain at 2019 Australian Open in Melbourne, Australia, Jan. 27, 2019. (Xinhua/Lui Siu Wai)
Novak Djokovic of Serbia celebrates winning after the men's singles final match against Rafael Nadal of Spain at 2019 Australian Open in Melbourne, Australia, Jan. 27, 2019. (Xinhua/Lui Siu Wai)