Katie Ledecky even upstaged Michael Phelps at the Olympics on Friday.

Ledecky set a world record by winning the women's 800-meter freestyle by an astounding 11.38 seconds. She's only the second woman to sweep the three longest freestyle races at the Olympics and the first one to do it since the 1968 Mexico City Games.

After winning four gold medals at the Rio de Janeiro Games and looking unbeatable, Phelps finally ran out of steam in what was the final individual race of his career - unless he decides to come out of retirement again.

The frenetic finishes in the swimming pool capped a day that included a big escape by the U.S. men's basketball team and a stunning loss by the women's soccer squad.

Phelps was seeking his 23rd Olympic gold medal and his fourth straight in the 100-meter butterfly, but he was denied by Singapore's Joseph Schooling, who got off to a blistering start and built a lead that even Phelps couldn't overcome.

In a changing of the guard that left him totally at peace, Phelps was beaten Friday by a 21-year-old who grew up idolizing the most decorated athlete in Olympic history. Joseph Schooling of Singapore built a big lead in the 100-meter butterfly and easily held off one of Phelps' patented comebacks, leaving him at 22 gold medals with one race, a relay, left to go.

With Anthony Ervin winning the men's 50 freestyle and Maya DiRado taking gold in the women's 200 backstroke, the Americans would have had a clean sweep were it not for the silver by Phelps, the most decorated Olympian in history.

Ledecky finished well before Jazz Carlin of Britain touched the wall for silver. She joined Debbie Meyer as the only women to sweep the 200, 400 and 800 freestyle races at the same Olympics.

Almaz Ayana opened the Olympic track meet Friday by running the 10K in 29 minutes, 17.45 seconds to shatter a 23-year-old record by more than 14 seconds.

"This was not my plan," Ayana said.

It was quite an impressive race, even though the stands were maybe a quarter full when it happened.

How impressive?

The 24-year-old Ayana, who had limited experience running 10Ks on tracks and is really considered a 5K specialist, won by more than 15 seconds. She was halfway through her victory lap while the largest pack in the field of 37 women was making its way across the finish line.

Spurred on by her pace, 18 women ran lifetime bests. Eight national records were set, including one by American Molly Huddle, who finished sixth. And silver medalist Vivian Cheruiyot, bronze medalist Tirunesh Dibaba and fourth-place finisher Alice Aprot Nawowuna recorded the third-, fourth- and fifth-fastest times in history, behind only the new record holder and the previous one, Wang Junxia of China.

In the night session, with the stands barely more packed than in the afternoon, came a different sort of surprise.

American Michelle Carter won the country's first medal since 1960 in women's shot put - and a gold one, at that - using her last throw of the night (20.63 meters) to beat two-time defending champion Valerie Adams of New Zealand.

"It's tough, but it's sport. Sometimes you take one on the chin," Adams said.

In the sprints, the expected list of women coasted through first-round heats at 100 meters. Two-time defending champion Shelly-Ann Fraser-Pryce of Jamaica led the way with a time of 10.96 seconds. Also still in the field are five women, including Americans Tori Bowie, Tianna Bartoletta and English Gardner, who have broken 10.8 this year.

And, of course, no day in track and field would be complete without at least a bit of doping news.

A Bulgarian steeplechase runner got booted from the Olympics a day before her scheduled race. Also, Kenyan 800-meter runner Ferguson Rotich showed up and made it through his round, two days after a coach borrowed his credential to grab something to eat in the athletes village, only to be met by doping-control officers who wanted to test Rotich.

The United States women's soccer team was eliminated by Sweden in the quarterfinals, a startling loss for the four-time Olympic champions that left Hope Solo without a shot at gold but with plenty of bitterness.

The U.S. goalkeeper criticized the Swedes for the way they played in beating the Americans 4-3 in a penalty shootout following a 1-1 draw - a result that means the world's top-ranked team will miss out on an Olympic gold-medal match in women's soccer for the first time.

Carmelo Anthony, Kyrie Irving & Co. survived their second straight strong challenge at the Rio Games, fending off Serbia 94-91 when Bogdan Bogdanovic missed a 3-pointer from the left wing with 2 seconds left that would have tied it.

Kevin Durant grabbed the rebound to keep the Americans unbeaten 48 hours after they barely escaped against Australia.

On a day that began with another round of rain, South America's first Olympics lingered under clouds of grief, doping and disrespect.

-Brazil's government declared a day of official mourning for a Rio Olympics police officer who died after being shot in the head making a wrong turn into one of the city's slums.

-A Chinese swimmer, Polish weightlifter and Bulgarian steeplechaser have been sanctioned for doping offences, which are being handled by the Court of Arbitration for Sport for the first time.

-And in a serious breach of judo etiquette with political overtones, an Egyptian judoka refused to shake the hand of his Israeli opponent after his loss.

Other highlights from Day 7:

Rafael Nadal, the singles champion at the 2008 Beijing Olympics, and Spain teammate Marc Lopez won the men's doubles title. Nadal also reached the semifinals in his bid for a second Olympic singles gold, overcoming his Brazilian opponent and a raucous flag-waving home crowd.

Nico Hernandez's chance for a gold medal ended Friday when he lost to Uzbekistan's Hasanboy Dusmatov. With a gnarly gash over his left eye, Hernandez had blurred vision and needed stitches. His consolation: his bronze medal in the light flyweight division ends a medal drought for the American boxers that stretched to 2008.

ennis player Monica Puig is one victory from Puerto Rico's first gold medal in Olympic history. Puig continued her surprising run by reaching the women's singles final, eliminating two-time Wimbledon champion Petra Kvitova of the Czech Republic 6-4, 1-6, 6-3. Puig is ranked 34th and unseeded but is assured of no worse than a silver medal.

A German Olympic canoe coach is fighting for his life after a car accident left him with serious head injuries. Stefan Henze, a canoe slalom silver medalist at the 2004 Games, underwent emergency surgery in a Rio de Janeiro hospital. He and a team official were heading to the athletes village when their taxi was in a wreck.

In another embarrassment for the Maria Lenk Aquatics Center, a planned practice session had to be called off to give officials more time to clean the green-tinged water - a four-days-and-counting scenario that prompted American diver Abby Johnson to dub it "the Swamp."