EW YORK - SEPTEMBER 06: (L-R) Singer Gavin Rossdale and singer Gwen Stefani attend the men's singles match between Roger Federer of Switzerland and Jurgen Melzer of Austria during day eight of the 2010 U.S. Open at the USTA Billie Jean King National Tennis Center on September 6, 2010 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images)
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.