Gwen Stefani: US Open with Gavin Rossdale!

Gwen Stefani and husband Gavin Rossdale share a moment while watching the US Open tennis tournament at the Billie Jean King Tennis Center in Queens, New York City on Monday (September 6).

The happy couple watched five-time champion Roger Federer beat out Austria’s Jurgen Melzer!

Next Thursday (September 16), Gwen will debut her L.A.M.B. Spring 2011 Collection at The Theater at Lincoln Center. Can’t wait!

UPDATE: When Gwen and Gavin‘s mugs appeared on the Jumbotron, the entire crowd cheered like crazy! When another female celeb popped up, audience members booed. Oops!

10+ pictures inside of US Open spectators Gwen Stefani and Gavin Rossdale…