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Novak Djokovic of Serbia kisses the trophy during the awarding ceremony after the men's singles final against Dominic Thiem of Austria at 2020 Australian Open in Melbourne, Australia on Feb. 2, 2020. (Xinhua/Wang Jingqiang)

Novak Djokovic of Serbia kisses the trophy during the awarding ceremony after the men's singles final against Dominic Thiem of Austria at 2020 Australian Open in Melbourne, Australia on Feb. 2, 2020. (Xinhua/Wang Jingqiang)