What to know

• Zheng makes astonishing recovery to win 7-5, 6-3French Open champion Andreeva beats Potapova The most important takeaway from the US Open is simple: do not, by any means, lead 5-0 against Zheng Qinwen. No scoreline is as hazardous. On Friday, the former ­Austr...S1
• Qinwen Zheng has done it again. The Chinese star came back from 0-5 down in the opening set to beat Iga Swiatek 7-5, 6-3 and reach the US Open quarterfinals. It is the second match in a row that Zheng has won a set after trailing 0-5 at this tournament. She ha...S2