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(200120) -- MELBOURNE, Jan. 20, 2020 (Xinhua) -- Serena Williams of the United States hits a return to Anastasia Potapova of Russia during their women's singles first round match at the Australian Open tennis championship in Melbourne, Australia on Jan. 20, 2020. (Xinhua/Zhu Wei) 20.01.2020 Melbourne Tenis Australian Open 2019 Foto: Xinhua / Pressfocus POLAND ONLY !!!