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Caroline Wozniacki of Denmark serves during the women's singles quarterfinal against Caria Suarez Navarro of Spain at Australian Open 2018 in Melbourne, Australia, Jan. 23, 2018. (Xinhua/Bai Xuefei)
Caroline Wozniacki of Denmark serves during the women's singles quarterfinal against Caria Suarez Navarro of Spain at Australian Open 2018 in Melbourne, Australia, Jan. 23, 2018. (Xinhua/Bai Xuefei)