He liked what he saw.
Phelps turned in perhaps the most impressive performance so far in his comeback, posting the third-fastest time in the world this year while easily beating rival Ryan Lochte in the 100-meter butterfly at the Bulldog Grand Slam on Friday night.
Despite some problems with his turn, Phelps had the packed house roaring when he touched in 51.67 seconds, considerably faster than the 52.11 he posted at the Santa Clara Grand Prix three weeks ago.
Lochte was a distant second in 53.08.
"I wanted to get under 52," Phelps said, breaking into a big smile. "I was sick and tired of seeing 52.1."
He had no trouble finishing ahead of Lochte, though it really wasn't a fair fight. Phelps' longtime foe also competed in the 200 freestyle, winning the "B'' final less than an hour before he returned to the water to face a rested Phelps.
More important for Lochte — his left knee seemed to hold up well.
This is his first meet for the laid-back Floridian since he reinjured the surgically repaired knee at the Mesa Grand Prix in April. It was initially hurt late last year when he tried to catch an exuberant fan and fell into a curb, requiring surgery.
"I hope I lose," said Lochte, who plans to swim a grueling six events in Athens. "It will just make me more hungry."
Phelps is set to swim three events at the weekend meet on the University of Georgia campus, a hastily arranged event that gave some of the top swimmers on the East Coast a chance to swim one more time competitively before the next month's national championships in Irvine, California.
The results from nationals, as well as the Pan Pacific Championships being held in Australia later in August, will determine the U.S. team for the 2015 world championships.
Phelps seems to be right on course, at least in his signature fly, finishing just 0.46 off the time that won the gold at the 2012 London Olympics. The only faster times this year were Thomas Dal's 51.44 in the Belgian Open and Viacheslav Prudnikov's 51.60 at the Russian national championships.
"I am very pleased with being able to go 51," Phelps said. "But in the grand scheme of things, I think it's just a small steppingstone to go where we hope to be."
He is still struggling with the consistency of his stroke. When things are going well, Phelps needs 16 strokes to cover the first 50 metres, 18 for the return lap. When he's just a little off, he winds up gliding into the wall too much, either when he's making his flip turn or coming to the finish.
"I was kind of bummed that I still can't hit a wall correctly," Phelps said.
Added his coach, Bob Bowman, "He looked crazy coming off the wall."
All in all, though, no complaints.
Phelps, who retired after the last Olympics and stayed away from the pool for more than a year, didn't come back to tarnish his legacy, which includes 18 golds and 22 medals overall — far more than any other Olympic athlete.
"I always set high expectations for myself, no matter what I'm doing," he said. "Bob and I have a plan of what I want to do. He knows what it's going to take to get there."
In other events, French Olympic star Yannick Agnel took the men's 200 freestyle in 1 minute, 47.27 seconds, followed by U.S. Olympians Conor Dywer (1:47.44) and Connor Jaeger (1:47.94). Lochte, swimming in that consolation final, actually posted the fourth-fastest time of the evening at 1:48.69, some 4 seconds faster than he went in the morning preliminaries while wearing a non-racing suit.
Allison Schmitt, coming back strong after a disappointing post-Olympic year, won the women's 200 freestyle in 1:58.16. Winner of five medals in London, she struggled a bit with fame and didn't even qualify for the 2013 worlds.
She's back on track with the Rio Games just two years away.
"I have more goals that I want to accomplish, which is why I'm back," Schmitt said. "I'm looking forward to this summer."
In the 400 individual medley, Olympic gold medallist Tyler Clary blew away the field in the men's race. His time of 4:21.66 was nearly 4 1/2 seconds ahead of runner-up Kevin Litherland. Melanie Margalis finished first on the women's side.
Micah Lawrence touched first in the women's 100 breaststroke, while the men's breaststroke was captured by Nicolas Fink. Seventeen-year-old Kathleen Baker took the women's 100 fly in 59.69, the only swimmer to break the minute barrier.
Of course, Phelps drew most of the attention.
His main foe was impressed by what he saw.
"He swam a fantastic race," Lochte said. "That was really fast."
Follow Paul Newberry on Twitter at www.twitter.com/pnewberry1963Suggest a correction