BEIJING – Even Michael Phelps couldn’t believe his eyes. He said he had to take off his goggles to make sure it was his name, and not Milorad Cavic, next to the No. 1 after a thrilling finish in the Olympic 100-meter butterfly.

Phelps, who was in seventh place at the turn, surged in the final few meters and somehow managed to out-touch the Serbian-American Cavic by a hundredth of a second. To the naked eye, it was nearly impossible to tell who won. And from some camera angles, it appeared Cavic had the gold. But the Omega electronic clock read: Phelps 50.58. Cavic 50.59.

The Serbian delegation filed a protest, but conceded that Phelps won after reviewing the tape provided by FINA, swimming’s governing body. USA Swimming spokesman Jamie Olson said the tape was slowed to one frame every 10-thousandth of a second to make sure Phelps actually touched first.

It was impossible to tell on

regular-speed replays.

“We filed the protest but it is already over,” said Branislav Jevtic, Serbia’s chief of mission for all sports. “They examined the video and I think the case is closed. The video says (Phelps) finished first.

It was Phelps’ seventh gold medal at these Olympics, which ties Mark Spitz’s 36-year-old record from Munich. He will attempt to break the record Sunday morning in the 400-meter medley relay.

Phelps was humbled to be on the same seven-gold pedestal as Spitz.

Phelps said, “The biggest thing is when someone says you can’t do things, when people say it’s impossible to tie or break these records, I proved anything’s possible. If you put in the hard work and put your mind to it, anything’s possible.”

“One word: epic,” Spitz told The Associated Press from Detroit. “It goes to show you that not only is this guy the greatest swimmer of all time and the greatest Olympian of all time, he’s maybe the greatest athlete of all time. He’s the greatest racer who ever walked the planet.”

This time, there was no world record, as there had been for Phelps’ previous six golds. Instead, the Baltimore phenom proved he can win in the tightest of races. Phelps made up ground in the final 50, and took an extra half-stroke at the finish, which would seem to have hurt him as Cavic’s hands were already underwater gliding to the wall. But Phelps’ extra kick surged him forward with force at the touchpad.

“When I saw the replay, when I saw I took that extra half stroke, I thought I lost the race,” Phelps said. “But I guess that’s exactly what I needed. I’m excited and relieved. It wasn’t until I saw the No. 1 next to my name that I let out my roar.”

It was reminiscent of the 100 fly finish at Athens four years ago, where Ian Crocker of Portland, Maine, appeared to have the race won but Phelps got him at the wall by 0.04.

“My last two Olympics I’ve been able to nail my finishes, and it’s been by four one-hundredths and one one-hundredths,” he said. “I’m happy and kind of at a loss for words.”

The lucky seventh gold also meant a $1 million bonus from Speedo, one of his many sponsors.

While the medley relay figures to be nothing more than a coronation, Phelps isn’t ready to talk about No. 8.

“It’s not over yet,” he said. “I really think the Australian team looks great for the relay. It’s going to be a race.”

All the talk heading into the Olympics was that fellow-American and world-record holder Crocker could spoil Phelps’ pool party in this event, but around the pool deck the past few days, the buzz was about Cavic. The Anaheim, Calif., native and Cal-Berkeley student set an Olympic record in the preliminary heats in 50.76 seconds, and swam the fastest semifinal time (50.92).

Cavic’s times were particularly impressive considering that Phelps and Crocker held the top 17 times in the event heading into the Olympics. Cavic, who is 6-foot-6, said after the semifinals that he was hoping to derail Phelps so that one day people would say, “Phelps had a chance to win eight and lost to some guy.” Cavic desperately wanted to be that guy.

Instead, he has to settle for the silver. Andrew Lauterstein of Australia won the bronze medal in 51.12. Crocker was again denied the first individual gold of his career; he didn’t even win a medal, finishing fourth by a hundredth of a second in 51.13.

“It was a tight one,” Crocker said. “I saw my short differential between getting a medal or not, but then I realized Michael’s was pretty close, too. I’m really glad that he came out on top.

“It was everything that an Olympic final should be. It doesn’t matter who’s in the heats, you just got to get out and race and it’s anybody’s game. It was one of the more intense races that I’ve been in, which makes it a great way to end the meet.”

Cavic said the difference between he and Phelps was as tiny as “shaving your fingers.” Swimming results can be so close, he said, that his coach cleaned up the hairs on the back of Cavic’s neck with clippers just before the race. “Those are the differences in swimming. Everything counts. You can’t even show one one-hundredth of a second on TV. It’s that close.”

Cavic was not surprised Phelps made his move at the end. In fact, he expected it.

“I knew I was leading the race. I usually swim a faster first 50 and Phelps is a back-half swimmer, so I knew he’d be chasing me at the end. I saw a shadow in the side of my goggles, so the final eight meters I just put my head down, didn’t breathe, and hoped for the best.”

When a Serbian reporter asked Cavic, “How does it feel to be the one man who beat Phelps?” Cavic smiled and replied: “I didn’t beat Phelps. Maybe I’m the only guy who had a real shot of beating Phelps. This is all completely new to me. I felt so much pressure, and I’m very proud I was able to control my emotions and get so close. It was an honor for me to race Michael Phelps with all eyes on me. If we got to do it again, I’d win it.”

Crocker, a quiet and unassuming rival, also wanted to be “that guy” who ruined Phelps’ day. So much so, in fact, that he put all his efforts into the 100-meter butterfly rather than race in multiple events. Crocker beat Phelps to win the world titles in 2003 and 2005, and set the world record (50.40) in 2005.

But Phelps beat Crocker in the 2004 Olympics by .04 seconds and edged him again in the 2007 world championships by .05 seconds.

Crocker : “Sports is all about one person trying to derail the other person’s dreams.”

As usual, Phelps’ quest for history overshadowed the other events at The Water Cube on Saturday where two more world records fell on the next-to-last day of swimming – the 22nd and 23rd of a lightning-quick week.

Rebecca Adlington of Britain won gold in the 800 freestyle, breaking Janet Evans’ 19-year-old world record – the oldest in swimming.

Adlington touched in 8:14.10 to crush the mark of 8:16.22 set by the American in Tokyo on Aug. 20, 1989. Alessia Filippi of Italy took the silver and Lotte Friis of Denmark the bronze.

Adlington completed a sweep of the women’s distance events in Beijing, having upset American Katie Hoff to win the 400 freestyle. There were no Americans in the field after Hoff and Kate Ziegler were shockingly eliminated in the preliminaries.

Kirsty Coventry of Zimbabwe finally won a gold in Beijing, defending her Olympic title in the 200 backstroke with a world record of 2:05.24. She lowered the mark of 2:06.09 set by Margaret Hoelzer at the U.S. trials last month.

Hoelzer not only lost her record but had to settle for silver. Reiko Nakamura of Japan earned the bronze.

Also, 41-year-old Dara Torres of the U.S. cruised into the final of the 50 free with the fastest semifinal time, 24.27. Australian teenager Cate Campbell was second at 24.42.

The final is Sunday, the wrapup to a thrilling competition at the Water Cube.

Paul Newberry of The Associated Press contributed to this report.