The lone two seeds remaining in the draw, Caroline Wozniacki and Naomi Osaka, both advanced to the semifinals at the Premier Mandatory event in Beijing.

World No. 2 Wozniacki scored an easy 6-2, 6-2 victory over Katerina Siniakova.

The Dane will meet surprise wildcard Chinese No. 1 Wang Qiang who knocked out the hot-handed Wuhan winner Aryna Sabalenka 7-5, 7-5.

“It really helps me to believe in myself when there are difficulties,” Wang said after. “I don’t know where this confidence comes from. I can’t really explain the source of confidence. But I trust myself on court. When I’m up or down, I trust myself to be able to overcome the situation.”

Wozniacki leads Qiang 3-1.

“I think we have very similar styles,” she assessed. “It will be a very tough match. She will never lose a point easily, so I have to do my best to fight for each point. I’m very proud of myself. Whatever happens in the next round, I will do my best.”

US Open champion Naomi Osaka came from a set down to take out China’s Zhang Shuai 3-6, 6-4, 7-5.

“It’s one of those moments where you don’t feel your best, but you have to play,” Osaka said after totaling 66 unforced errors. “Both of us were trying our best. It was just one of those things that I had to find a way how to push through.”

Shaui led 6-3, 2-0 before the Japenese mounted her comeback.

Osaka will test US Open semifinalist Anastasija Sevastova in her semifinal. The Latvian downed Dominika Cibulkova 6-3, 7-6(5). Osaka has won both meetings.

“I’ve played Sevastova twice, and both were on hard courts. I know that she’s a great player. Everyone knows this. It’s like at this round, of course you have to be good,” Osaka said.

“I’m expecting a really hard match. I know that she’s going to fight really hard. I didn’t even notice until yesterday that I’ve never won a round here. Hopefully I keep the momentum.”