Defending champion Petra Kvitova eased into the final of the Nature Valley Classic in Birmingham by beating Mihaela Buzarnescu.
The Czech, a two-time Wimbledon champion, showed her strength on grass with a 6-3 6-2 win over the Romanian.
The fourth seed faces Magdalena Rybarikova in Sunday’s final after the Slovak beat Barbora Strycova of the Czech Republic 7-6 (7-1) 6-4.
World number 19 Rybarikova was a Wimbledon semi-finalist last year.
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Kvitova, who has won four WTA titles in 2018 – more than any other player – has yet to drop a set this week.
“Amazing statistics this week,” the world number eight said. “I didn’t expect that from the beginning of the season. I didn’t really start well in Australia.
“So far this season is incredible, and I really can’t imagine a better season so far.”
While Kvitova was in command throughout her match, Rybarikova could not say the same.
The 29-year-old had to fight back from a break down in both sets against Strycova.
“I knew it was going to be a tough match because she’s such a tricky player and she’s amazingly talented,” said Rybarikova, who won the Birmingham event in 2009.
Meanwhile, in Mallorca, at another of the pre-Wimbledon grass-court events, Germany’s Tatjana Maria reached her first WTA final by beating 19-year-old American Sofia Kenin 6-2 2-6 6-4.
The world number 79 will face third seed Anastasija Sevastova in Sunday’s final after the Latvian beat former US Open champion Sam Stosur of Australia 7-6 (7-1) 6-1.