Crowd favorite Caroline Wozniacki defeated Heather Watson 6-2 3-6 7-5.
“It could have gone both ways,” Wozniacki said. “We had played twice before and they were close matches so I knew it would be difficult today. I got a little lucky.
“She is a good player, has a great volley, mixes it up and serves well on grass, so a lot of credit to her.”
The 2009 champion will meet Karolina Pliskova in the final.