American Madison Keys will face Czech Barbora Strycova in the final of the Aegon Classic in Birmingham on Sunday.
Keys, 21, reached the final with a 3-6 6-3 7-6 (7-3) victory over Carla Suarez Navarro and in doing so broke into the world's top 10 for the first time.
Strycova, 30, beat American Coco Vandeweghe 2-6 6-4 6-3 for her second final appearance in three years.
The occasion seemed to get to Vandeweghe, who burst into tears while sitting in her chair in the final set.
She said: "I'm not really a crier so I don't know what that was about.
"There's been a lot of things going on this week so I guess it was an accumulation of all of them."