Aryna Sabalenka extended her winning streak at the Wuhan Open to 20 matches with a straight-set victory over Elena Rybakina in the quarter-finals on Friday.
World number one Sabalenka, who is the three-time defending champion in Wuhan, beat eighth seed Rybakina 6-3 6-3 and said the Kazakhstani "always pushes me to the limit to get the win".
The 27-year-old Belarusian, who is the top seed, will face American Jessica Pegula in the semi-finals on Saturday.
Pegula, 31, needed three sets to overcome Czech Katerina Siniakova 2-6 6-0 6-3 in the last eight.
Sabalenka, who retained her US Open title in September, controlled the match against Rybakina, sealing the first set with a hold before breaking the Kazakhstani's serve in the first game of the second.