Second-ranked Aryna Sabalenka served up a master class to beat Magdalena Frech of Poland 6-2, 6-2 and maintain her undefeated record at the Wuhan Open.
The Belarussian fired 42 winners in 16 games, and wrapped up her latest victory in 1 hour, 23 minutes to advance to her eighth semifinal of the year where she'll meet fourth-ranked Coco Gauff.
Sabalenka, the U.S. Open champion, is now 15-0 in Wuhan after winning the title on her first appearance in 2018 and defending her crown in 2019 before the tournament took a five-year hiatus from the calendar.
Earlier Friday, Gauff's impressive Asian swing showed no signs of ending as she routed Poland's Magda Linette 6-0, 6-4 for her 50th win of the season.
It was also the 20-year-old American's ninth-straight win in China, a streak which includes victory at the China Open last week, and never looked in doubt as Gauff broke the No. 45-ranked Linette four times and struck 19 winners to Linette's 13.
"I'm really happy with how I played," Gauff said. "Obviously a smooth first set. Had chances to maybe close it out in the 5-3 game in the second, but happy I was able to close it out on my serve."
It was a disappointing end to what was otherwise an impressive week for the 32-year-old Linette who had reached her first WTA 1000 quarterfinal.
The 51st-ranked Wang Xinyu of China, who beat third-ranked Jessica Pegula in the third round, rallied for a tight 4-6, 7-5, 7-6 (6) victory over Ekaterina Alexandrova.
Wang will next play compatriot and Paris Olympics gold medalist Zheng Qinwen, who beat sixth-ranked Jasmine Paolini 6-2, 3-6, 6-3.