NEW YORK, NEW YORK - AUGUST 26: Karolina Muchova of Czechia serves with partner Jakub Mensik of Czechia (not pictured) during the Mixed Doubles Semifinal of the US Open against Mirra Andreeva and Andrey Rublev at USTA Billie Jean King National Tennis Center on August 26, 2026 in New York City. (Photo by Caleb Bowlin/Getty Images)