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Novak Djokovic (L) of Serbia and Dominic Thiem of Austria pose with the trophy during the awarding ceremony after the men's singles final at 2020 Australian Open in Melbourne, Australia on Feb. 2, 2020. (Photo by Bai Xue/Xinhua)

Novak Djokovic (L) of Serbia and Dominic Thiem of Austria pose with the trophy during the awarding ceremony after the men's singles final at 2020 Australian Open in Melbourne, Australia on Feb. 2, 2020. (Photo by Bai Xue/Xinhua)