The second-seeded Swiss will play either Andy Roddick from the United States or Britain's Andy Murray, who were set to play immediately afterwards.

Seeming to get stronger with every match, Federer took advantage of his breakpoint chances to subdue the 31-year-old German 7-6 (3), 7-5, 6-3 in just over two hours.

Federer never faced a break point as he beat 24th-seeded Haas for the ninth straight time to reach his record 20th Grand Slam final, pulling out of a tie with Ivan Lendl.

"I'm very happy with my performance and it's unbelievable to back into another Wimbledon final," Federer said.

"I've had a lot of pressure over all the years, so this is just another great match, great opportunity for me to get into the history books."

Federer is the first man to make it to seven consecutive Wimbledon finals in the history of a tournament that began in 1877.

He has won 18 straight matches as he closes in on his 15th major title. He is currently tied with Pete Sampras with 14.

On the record

If Federer wins on Sunday, he will be the third player to win six or more Wimbledon titles. William Renshaw and Sampras both won seven.

"It's not the only reason why I'm playing tennis, because mostly because I love it and I enjoy playing tennis, but sure going for something that big this coming Sunday, it's quite extraordinary," he said.

Federer won five consecutive titles at the All England Club in southwest London before losing to Spain's Rafael Nadal in last year's final.

By winning the French Open last month, Federer completed a career Grand Slam and tied Pete Sampras with 14 major championships.

"The consistency, right there, in the big tournaments is ridiculous," said third-seeded Andy Murray.

The 22-year-old Scot is trying to become the first British man to reach a Wimbledon final since Bunny Austin in 1938. No Briton has won the men's title on the grass of Wimbledon since Fred Perry two years earlier.

swissinfo.ch and agencies