WIMBLEDON, England — Rising, rising, rising, high above the most famous patch of grass in tennis, Roger Federer channeled Pete Sampras on match point in the Wimbledon semifinals yesterday, tucking both feet back beneath his body and uncorking an overhead smash.

And now, after years of chasing Sampras, Federer is poised to surpass him.

A victory over No. 6-seeded Andy Roddick of the United States in tomorrow's final at the All England Club would give Federer his 15th Grand Slam singles championship, breaking a tie with Sampras for the most in history. It also would give Federer a sixth Wimbledon title and a return to No. 1 in the rankings.

As it is, No. 2 Federer's overwhelming 7-6 (3), 7-5, 6-3 victory over No. 24 Tommy Haas of Germany in yesterday's opening match on Centre Court put the Swiss star in a seventh consecutive Wimbledon final and 20th career Grand Slam final — establishing two other marks.

"I'm very proud of all the records I've achieved, because I never thought I would be that successful as a kid. You know, I would have been happy winning a couple tournaments and maybe collecting Wimbledon," the 27-year-old Federer said. "It's quite staggering."

Winning a Wimbledon semifinal — indeed, any Grand Slam semifinal — is all so very been-there, done-that for Federer: He is 20-3 in major semis over his career, reaching 16 of the past 17 major finals.

"I know what's on the line," Federer said. "I hope I can play another good match."

His previous match against Haas, on June 1 in the fourth round of the French Open, was much tighter.

This time, Federer was quite close to perfect. He won a remarkable 72 of 83 points on his serve, did not face a single break point, and finished with 49 winners and only 15 unforced errors.

"You know, that's the way it goes playing against him," Haas said. "There aren't really any weaknesses."

Roddick celebrated rather emotionally after finishing off No. 3 Andy Murray of Britain 6-4, 4-6, 7-6 (7), 7-6 (5) in yesterday's second semifinal. The 2003 U.S. Open champion, still seeking a second major title, dropped to his knees, leaned forward and covered his head with his hands.

Leaving the court, Roddick paused to enjoy the moment, thankful that all of the changes he's made over the past several months paid dividends: tweaking his diet to drop 15 pounds, hiring a new coach, working more than ever to improve his returns, his volleys, his backhand.

"To be honest, the last couple of years, I didn't know if I'd ever get a chance to play for another Grand Slam title," Roddick said. "Now I get to. It's just a dream."