Muchova ends Sabalenka's 15-match streak at China Open

It was the third consecutive time Muchova, a US Open semi-finalist last month, has beaten the three-time major winner, with the Czech now leading their head-to-heads 3-1.

Sabalenka's streak started with a title at Cincinnati in August and continued with her US Open title last month.

"Tennis is a roller-coaster... I just really tried to fight for every ball and it was worth it," said Muchova, who was out for over three months after having wrist surgery in February.

She will now meet the Paris Olympics gold medallist Zheng Qinwen in the semi-finals after the Chinese star beat Russian teenager Mirra Andreeva 5-7 6-0 6-4.

"Muchova is a smart opponent. I have practiced with her before... I'll give my best," Zheng said.