The thought of the top men’s and women’s singles players teaming up is one that has often intrigued tennis fans around the world.

Casper Ruud and Iga Swiatek will face the top-seeded duo of Jessica Pegula and Jack Draper in one semifinal of the revamped US Open mixed doubles tournament. Sara Errani and Andrea Vavassori meet Danielle Collins and Christian Harrison in the other.

The U.S. Open overhauled its mixed doubles tournament in hopes of drawing the top singles players. The defending champions don’t intend to move out of the way so easily.