Both 2026 US Open mixed doubles champions, Karolína Muchová and Jakub Menšík, represented Czechia.
The all-Czech pair defeated Switzerland’s Belinda Bencic and Italy’s Flavio Cobolli in the final. Muchová and Menšík won 6–3, 1–6, [10–6] to take the mixed doubles championship.
The result gave each Czech player a first Grand Slam title in any discipline. Their partnership was notable because both players were primarily known for singles, making the mixed-doubles victory a major addition to their careers.
Czechia is the current English short name for the Czech Republic. Tennis records and tournament materials may use either wording, but “Czechia” is the country label used for the champions in the 2026 event.