Aryna Sabalenka will meet Ekaterina Alexandrova in The Rosmalen Grass Court Championship final, while Beatriz Haddad Maia set up a showdown with Alison Riske in the Nottingham Open showpiece.
Sabalenka, ranked sixth in the world, put paid to Shelby Rogers 7-6 (8-6) 6-0, as the favourite in the Netherlands reached her second singles final this year.
World number 30 Alexandrova had little difficulty against Veronika Kudermetova as she triumphed 6-3 6-1 to reach her first singles final of the season.
Sabalenka and Alexandrova have split four previous meetings with two wins apiece, with the latter taking the most recent clash in straight sets at the Moscow quarter-finals last year.
Seventh seed Haddad Maia stunned favourite Maria Sakkari in the quarter-finals to tee up the last-four clash with Tereza Martincova in Nottingham.
The Brazilian raced out the blocks once more to progress past Martincova, with the former 6-3 4-1 up before the Czech retired with injury.
Rain stopped play in the second semi-final between Viktorija Golubic and Riske with the scores level at one set each.
Sixth seed Riske capitalised from that point onwards to edge past Golubic 6-3 4-6 6-3.