The world’s elite converge on New York, New York for the US Open, but many of the top-ranked players across the men’s and women’s game have arrived a week early. Why? For the revamped mixed doubles event,

Veteran doubles experience overcame singles stardom as defending champions Andrea Vavassori and Sara Errani reached the semi-finals at the U.S. Open's reimagined mixed doubles on Tuesday, as the event kicked off with a new format and new fans.

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.