Fourth seed Ekaterina Makarova survived a second-set nightmare to beat Andrea Hlavackova and progress through to the final of the Pattaya Women's Open, where she will meet Karolina Pliskova.
Makarova, the only seed to reach the last four of the Thailand tournament, lost all six games in the second set but she recovered in time to win the decider and claim a 6-3 0-6 6-4 triumph.
Makarova said: "The best part of my game is that I was fighting.
"At the end of the second set I was so angry because here I'd already played two matches in three sets and I really wanted to finish it in two sets. But she played amazing all that set and it was difficult to do anything."
Another Czech awaits Makarova in the final as Pliskova stands between the Russian and her second career title following her success at Eastbourne in 2010.
Pliskova was also taken to three sets in her semi-final before overcoming Germany's Julia Goerges 6-3 4-6 6-3.
There was a total of 29 aces in that match and Pliskova admitted it was far from easy as both players dominated on serve.
"There weren't any rallies because we were both serving well and we have similar games, so it was tough," Pliskova said.
"In the second set she was serving really well. I almost couldn't do anything. I tried to stay calm and play my game and wait for my chance."