Zheng Qinwen comes through an injury and qualifying to make a run to the US Open quarterfinals
NEW YORK — Zheng Qinwen won't deny it. Having to qualify for the U.S. Open was tough. The qualifying tournament is for up-and-coming players, or maybe ones who are on their way out. It's not a place to find players with resumes like Zheng's. "Psychologically, it is very difficult to accept," the 23-year-old from China said. "I mean, I used to be top 10, Olympic champion. I've played in the big stadiums since the beginning." Now she's back in them again after engineering comebacks from 5-0 deficits in her last two matches, first against No. 22 Madison Keys and then No. 8 Iga ...