伊藤美诚
伊藤美诚-
卫冕世界冠军丁宁在迎战日本15岁选手伊藤美诚的比赛中也遇到了些困难。
Reigning world champion Ding Ning also had a tough task against Japanese 15-year-old Mima Ito .
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男女混合双打，混双中国的许昕和刘诗雯以及日本的水谷隼和伊藤美诚在周日的混双半决赛中获胜，进入了该项赛事的首个奥运会决赛。
mixed doubles China 's Xu Xin and Liu Shiwen and Japan 's Jun Mizutani and Mima Ito won their mixed doubles semi-finals on Sunday to reach the event 's first Olympic final .