Zheng, Potapova pull off upsets to reach US Open last 16
发生了什么
Zheng Qinwen rallied from 0-5 down in the final set to stun Madison Keys and reach the US Open last 16 as American hopes took a knock on a Saturday of surprises.Keys raced to a 5-0 lead in the third but Zheng had a last stand in her.
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