NEW YORK (AP) -- China's Peng Shuai finally reached a Grand Slam quarterfinal in her sixth try.
The 39th-ranked Peng beat a seeded player for the third straight match at the U.S. Open, defeating No. 14 Lucie Safarova 6-3, 6-4 on Sunday.
Peng had been 0-5 in fourth-round matches at major tournaments. She becomes the third Chinese player to reach a Grand Slam quarterfinal after Li Na and Jie Zheng.
Safarova was coming off a semifinal run at Wimbledon.
Peng faced only one break point and had just seven unforced errors.