Roger Federer overcame early problems to beat Portugal's Rui Machado and give Switzerland a 2-0 lead in the Davis Cup on Friday. Federer's service was broken twice in the opening set by the 93rd-ranked Machado before he recovered to win 5-7, 6-3, 6-4, 6-2 in the Group I second-round match. Federer was playing his first match since losing in the Wimbledon quarterfinals to Jo-Wilfried Tsonga... More...