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Rafael Nadal of Spain competes during the men's singles first round match against Hugo Dellien of Bolivia at the Australian Open tennis championship in Melbourne, Australia on Jan. 21, 2020. (Xinhua/Bai Xuefei)
Rafael Nadal of Spain competes during the men's singles first round match against Hugo Dellien of Bolivia at the Australian Open tennis championship in Melbourne, Australia on Jan. 21, 2020. (Xinhua/Bai Xuefei)