Roger Federer celebrates after winning the men's singles championship over Andy Murray at the U.S. Open. Federer won Monday in New York.

New York ? The handwritten letters and the e-mails, the care packages and – get this – the instructional DVDs began reaching Roger Federer early in the season, after a bout of mononucleosis precipitated the end of his streak of 10 consecutive Grand Slam finals.

The volume increased after Federer lost the French Open and Wimbledon finals. From all around the world they arrived, some to his parents’ house in Switzerland, some to his agent, some to his hotels. They came from retired players and from current coaches, from doctors, from fans. They offered good wishes, medical advice, even tennis advice.

Everyone figured Federer needed help, and everyone figured they knew how to help.

Turns out Federer was just fine. Turns out he still knew how to win a major tournament. He proved that Monday night, easily beating Andy Murray, 6-2, 7-5, 6-2, to win a fifth consecutive U.S. Open championship and 13th Grand Slam title overall.

“I felt like I was invincible for a while again,” said Federer, the only man in tennis history to win five straight titles at two major events.

He moved within one Grand Slam title of tying Pete Sampras’ record of 14.

“I always knew that if I were to get one Slam under my belt, especially the last one, things weren’t looking that bad, like everybody was talking about,” Federer said. “I didn’t feel I was under pressure to prove myself in trying to win here, but this definitely feels very sweet.”

Whatever motivation he might have derived from perceived slights, Federer was absolutely superb against Murray, stretching his winning streak at Flushing Meadows to 34 matches.