In the second set, Zheng mounted a determined comeback but struggled with seven double faults that disrupted her service games. Muchova stayed steady, holding off Zheng's efforts to secure a 6-4 win and a place in the final.

"I am just really tired. No energy. That's it," Zheng reflected. "I know exactly why I fell, because I wasn't focused enough. I was too tired. If I had more sleep yesterday, I could have done better."

"Tough battle out there today. I was happy that I was able to hold my serve throughout the match," Muchova said. "I will try my best and challenge her [Coco Gauff]. Hopefully, I'll get the best result tomorrow."