Chinese star Peng Shuai retired while trailing 1-3 in the first set Saturday, sending Belinda Bencic of Switzerland into the Tianjin Open tennis final.
"I am exhausted and I can barely move my feet," said Peng, who had also quit in the middle of the US Open semi-final, reports Xinhua.
The third-seeded Swiss will take on American Alison Riske, who crushed Chinese Zheng Saisai 6-0, 6-1.