French Open winner Barbora Krejcikova and Tereza Martinvova set up the first home final in six years in Prague on Saturday with a pair of dominating semi-final wins.
Krejcikova will be contesting her third final in her past four tournaments after crushing Wang Xinyu 6-1, 6-2 in 69 minutes.
The afternoon went equally smoothly for the 78th-ranked Martincova, who put out Belgian Greetje Minnen 6-3, 6-4 in less than 90 minutes to assure a first career final.
The last time a pair of Czech mates met in a final was 2015 New Haven, when Petra Kvitova defeated Lucie Safarova,
Krejikova stayed in total control against 19-year-old Chinese Wang, ranked a distant 174th, who was playing in her first semi-final at the Tour level.
The Czech second seed advanced faced just one break point while breaking her inexperienced opponent five times as Wang committed 20 unforced errors.
Krejcikova is riding a hot streak with victories in 19 of her past 20 matches on three different surfaces – hardcourt, grass and clay.
The WTA No. 13 who lost to eventual champion Ash Barty inthe Wimbledon fourth round will aim for a third clay title after back-to-back success at Strasbourg and Roland Garros in the spring.
Martincova earned victory as she played a fourth career semi after losses in Quebec, Gstaad and Istanbul over the last five years.
No. 122 Minnen ended with 24 unforced errors to just a dozen winners but saved a match point before taking the loss.
She has defeated Krejcikova twice in their three previous matches.