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Spain's Rafael Nadal leaves the court after announcing retiring during the men's singles quarterfinal against Croatia's Marin Cilic at Australian Open 2018 in Melbourne, Australia, Jan. 23, 2018. (Xinhua/Bai Xuefei)
Spain's Rafael Nadal leaves the court after announcing retiring during the men's singles quarterfinal against Croatia's Marin Cilic at Australian Open 2018 in Melbourne, Australia, Jan. 23, 2018. (Xinhua/Bai Xuefei)