Andrea Vavassori, left, of Italy, and Sara Errani, of Italy, hold up the championship trophy after defeating Iga Swiatek, of Poland, and Casper Ruud, of Norway, in the mixed doubles final at the U.S. Open tennis championships, in New York. Andrea Vavassori ...

The inaugural star-driven mixed doubles event at the U.S. Open ended with Sara Errani and Andrea Vavassori outlasting Iga Swiatek and Casper Ruud in a match tiebreak.

US Open mixed doubles champions Sara Errani and Andrea Vavassori insist they are playing for “doubles players” as they reached the semi-finals of the new-look event on Tuesday.