LONDON  - Play in the Wimbledon men's singles final was interrupted by rain for a second time on Sunday with the match between Rafael Nadal and Roger Federer delicately poised at 2-2 and 40-40 in the fifth and final set. Nadal won the first two sets 6-4 but defending champion Federer fought back by winning tie-breaks in both the third and fourth, saving two match points in the fourth. The Spaniard had led 5/2 in the fourth set breaker but the champion stormed back to lead 6/5 and claim a set point which Nadal saved. Incredibly, Federer, with his title slipping away, saved two match points - the first with a stunning backhand down the line - and then grabbed another set point at 9/8 before levelling the final when Nadal, stunned by his failing nerve, went long with a forehand. Federer is bidding to become the first man since the 19th century to win six Wimbledon titles in a row.  while Nadal, who humiliated the Swiss in the French Open final, was hoping to be the third man to win Roland Garros and Wimbledon in the same year.