The 49th-ranked Karolina Muchova stunned top seed Aryna Sabalenka in three sets to reach the China Open semifinals on Friday.
The Czech player won 7-6 (7/5), 2-6, 6-4, and faces China’s Olympic champion Zheng Qinwen or 17-year-old Russian Mirra Andreeva for a place in the final.
Last year’s US Open champion Coco Gauff plays Spain’s former world number two Paula Badosa in the other semifinal in Beijing.
World number two Sabalenka was on a streak of 15 victories in a row, claiming titles in Cincinnati and then the US Open for the first time.
The Belarusian previously had trouble though with Muchova, who this time last year was inside the top 10 before injury struck.
US Open semifinalist Muchova had won the last two meetings between them with both going to a deciding set.
This encounter proved to be just as tight as Sabalenka’s hopes of usurping Iga Swiatek at the top of the rankings took an unexpected hit, having been a break up at 4-2 in the deciding set and seemingly on course for the last four.
Three-time major champion Sabalenka faced three break points at the start but she held firm, then had a sniff herself on her opponent’s serve at 2-1, but Muchova similarly refused to buckle.
The hard-hitting Sabalenka had set point on Muchova’s serve at 5-4 but surrendered the opportunity when she rattled her forehand wide on the Czech’s second serve.
Muchova double-faulted to give Sabalenka another chance to wrap up the first set but again she failed to take it.
Sabalenka started the second set brightly to break for 2-1 and broke once more on the way to sealing the set with comparative ease.
