After triumphing in Germany last week, Alexander Zverev collected his second ATP title of 2020 with minimum fuss against Diego Schwartzman.
After saving four match points in the semi-final, Ugo Humbert took home the title at the European Open after beating Alex de Minaur.
The first final between players from Belarus on the WTA Tour lasted just 68 minutes, Aryna Sabalenka losing just four games.
A week on from winning the Cologne Indoors, Alexander Zverev will face Diego Schwartzman in the Cologne Championships final.
Victoria Azarenka has won 21 of her 39 career finals so far, and she starts as favourite for the Ostrava Open title match.
Alexander Zverev and Diego Schwartzman had to dig deep to reach the Cologne Championships semi-finals.
Victoria Azarenka picked apart Elise Mertens' game at the US Open last month and repeated the treatment on Friday at the Ostrava Open.
Tennis is vulnerable to match-fixing, but allegations at the French Open prompted evidence of "a system and mechanism to tackle corruption".
Gilles Simon sprung a surprise on Denis Shapovalov in Cologne, where Diego Schwartzman made serene progress to round three.
From strong positions in the deciding set of their matches, Karolina Pliskova and Coco Gauff found a way to lose at the WTA Ostrava Open.