Czech stars Karolina Muchova and Jakub Mensik claimed the US Open mixed doubles title on Wednesday, defeating Switzerland’s Belinda Bencic and Italy’s Flavio Cobolli 6-3, 1-6, 10-6 on Arthur Ashe Stadium. The victory gave Muchova and Mensik their first Grand Slam trophy as a team, after a thrilling contest that was decided by a 10-point match tiebreak. Czech Pair Make Fast Start Muchova and Mensik came out strongly in the opening set, with Mensik’s powerful serve proving difficult for their opponents to handle.