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