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(190114) -- MELBOURNE, Jan. 14, 2019 (Xinhua) -- Polona Hercog of Slovenia serves during women's single's first round match between Angelique Kerber of Germany and Polona Hercog of Slovenia at the 2019 Australian Open in Melbourne, Australia, Jan. 14, 2019. Angelique Kerber won 2-0. (Xinhua/Lui Siu Wai) - lvxiaowei - 14.01.2019 Melbourne Tenis Australian Open 2019 Foto: Xinhua / SIPA / Pressfocus