The rocker couple watched pal Roger Federer beat the No. 13 player in the quarterfinals of the Grand Slam tournament yesterday from the comfort of the tennis great's guest box. The star-studded crowd also included Cameron Diaz and A-Rod, among others.
Gwen Stefani & Gavin Rossdale Attend U.S. Open as Guests of Tennis Pro Roger Federer
Tuesday, Sep 7, 2010 Updated at 7:15 AM EST