Roger Federer defeated Richard Gasquet 6-4, 6-2, 6-2 in the first reverse singles match on Sunday as Switzerland won the Davis Cup final against France by taking an unassailable 3-1 lead. The 17-time Grand Slam champion gave Switzerland its first title in the team competition and added the only big trophy in tennis missing from his collection. The 33-year-old Federer and Stan Wawrinka had put Switzerland into a 2-1 lead on Saturday with a straight sets defeat of Gasquet and Julien Benneteau in the doubles. Federer was thrashed by Gael Monfils in his first singles match after struggling with a bad back but recovered as the weekend progressed and did not face a break point on Sunday. ``I'm happy I was able to stay calm and play a good match, and I'm really happy for the guys in the team,'' Federer said.