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Naomi Osaka reacts during the women's singles semifinal match between Naomi Osaka of Japan and Karolina Pliskova of the Czech Republic at the 2019 Australian Open in Melbourne, Australia, on Jan. 24, 2019. (Xinhua/Lui Siu Wai)
Naomi Osaka reacts during the women's singles semifinal match between Naomi Osaka of Japan and Karolina Pliskova of the Czech Republic at the 2019 Australian Open in Melbourne, Australia, on Jan. 24, 2019. (Xinhua/Lui Siu Wai)