RIO DE JANEIRO (AP) The Latest on the Olympics in Rio de Janeiro (all times local):
Michael Phelps has earned the 19th gold medal of his career, helping the United States win the 4x100-meter freestyle relay at the Rio Olympics.
Phelps took the second leg after Caeleb Dressel led off for the Americans, and it was another memorable performance at a distance that isn't Phelps' specialty. His split of 47.12 seconds gave the Americans a lead they never relinquished. In fact, it was a faster time than all but the three anchors on the medal-winning teams.
Ryan Held protected the top spot before handing off to Nathan Adrian, the top sprinter in America. It was never really in doubt at that point, as Adrian touched first in 3 minutes, 9.92 seconds. Defending Olympic champion France took the silver in 3:10.53, while Australia rallied for the bronze in 3:11.37.
Brazil's dream of winning a soccer gold medal is quickly turning into a nightmare.
Brazil drew its second consecutive game at the Olympic tournament Sunday, being held by Iraq to a 0-0 draw and hearing more loud jeers from the home fans.
The result in Brasilia leaves Brazil tied for second place in Group A, in need of a victory in the final game, against Denmark on Wednesday in Salvador, to advance to the next round and avoid another embarrassing elimination at home two years after the 7-1 loss to Germany at the World Cup.
Neymar, the tournament's biggest star, played below expectations for the second straight game, and young strikers Gabigol and Gabriel Jesus also struggled.
Upset fans chanted ''Marta, Marta,'' in reference to the five-time world player of the year who has been thriving with the women's national team.
MEDAL ALERT: Michael Phelps and the United States have captured gold in the men's 4x100-meter freestyle relay at the Rio Olympics. France claimed the silver and Australia took the bronze.
UPSET ALERT: Top-seeded Nicolas Mahut and Pierre-Hugues Herbert of France lose in first round of men's doubles tournament 7-6 (4), 6-3 to Colombia's Juan-Sebastian Cabal and Robert Farah.
Katie Ledecky has given the United States its first swimming gold medal of the Rio Olympics with a world record in the women's 400-meter freestyle.
The result was totally expected. Ledecky has dominated the longer freestyle events since winning gold in the 800 free at the London Olympics as a 15-year-old.
She was doing nothing but racing against the clock Sunday night. No problem there.
Ledecky kicked off the first wall with a lead of nearly a body length and steadily pulled away from the overmatched field - as well as the world-record line superimposed on the video screen as her powerful arms churned through the water.
When Ledecky saw the time - 3 minutes, 56.46 seconds - she let out an uncharacteristic scream and pumped her right fist. The 19-year-old crushed the mark of 3:58.37 that she set nearly two years ago on the Gold Coast of Australia, and had been chasing ever since.
Juan Martin del Potro is back.
Top-ranked Novak Djokovic was swept out of the Olympic men's singles tennis tournament in the first round Sunday by the 2009 U.S. Open champion 7-6 (4), 7-6 (2). Because of three left wrist surgeries, del Potro is ranked just 145th in the world. But when the Argentine is healthy and smacking his signature forehand around the court, his play is worthy of the gold medal match.
It was a raucous atmosphere in the last match of the night on center court, where del Potro fans chanted for him and Brazilians would try to drown out their rivals with cheers for Djokovic.
With the loss, Djokovic is still left seeking his first Olympic gold medal.
Another day, another world record for Britain's Adam Peaty at the Rio Olympics.
Peaty took gold in the men's 100-meter breaststroke Sunday night with a time of 57.13 seconds, shattering the mark of 57.55 he set one day earlier in the preliminaries.
Peaty cruisied away from Cameron va der Burgh of South Africa, the defending Olympic champion who took silver this time in 58.69.
The bronze went to Cody Miller of the United States, whose time of 58.87 held off teammate Kevin Cordes.
The crowd at the Olympic Aquatics Stadium went into frenzy at the sight of two Brazilians in the final. But Joao Gomes finished fifth and Felipe Franca was seventh.
MEDAL ALERT-WORLD RECORD: Katie Ledecky of the United States has set a world record in the women's 400-meter freestyle to win gold at the Rio Olympics. Jazz Carlin of Britain took the silver and Leah Smith of the United States grabbed the bronze.
MEDAL ALERT-WORLD RECORD: Adam Peaty of Britain has set a world record to win gold in the men's 100-meter breaststroke at the Rio Olympics. Cameron van der Burgh of South Africa earned the silver and Cody Miller of the United States claimed the bronze.
UPSET ALERT: Top-ranked Novak Djokovic loses first-round Olympic tennis match to 2009 U.S. Open champion Juan Martin del Potro
Andy Murray and his older brother Jamie exited in the first round of doubles at the Rio de Janeiro Games, making them 1-3 as a team at the Olympics.
The second-seeded British pair lost to Brazilians Thomaz Bellucci and Andre Sa 7-6 (6), 7-6 (14) in front of a loud partisan crowd Sunday night, hours after Andy won his opening singles match as the defending champion in that event.
The Murrays had their chances to extend the 2-hour match, holding five set points in the second tiebreaker, but failed to convert any.
The unseeded Brazilian duo needed seven match points to close the deal.
The Murray brothers also lost in the first round of the 2012 London Olympics, and in the second round four years earlier in Beijing.
Andy is a three-time Grand Slam champion in singles, including a second Wimbledon title a month ago.
Sarah Sjostrom of Sweden has broken her own world record in the women's 100-meter butterfly to take gold at the Rio Olympics.
Sjostrom led right from the start and touched in 55.48 seconds, breaking the mark of 55.64 she set at last year's world championships. She sat on the edge of the deck, pumping her arms in the air, and then appeared to be overcome by tears as she climbed to her feet.
This was her first Olympic medal, after she finished fourth in the 100 fly at the London Games four years ago, missing out on the bronze by just 23-hundredths of a second.
It was the fourth swimming world record of the Rio Games.
Penny Oleksiak of Canada took the silver in 56.46, edging out defending Olympic champion Dana Vollmer. The American, who had her first child last year, settled for the bronze this time in 56.63.
MEDAL ALERT-WORLD RECORD: Sarah Sjostrom of Sweden has set a world record to win gold in the women's 100-meter butterfly at the Rio Olympics. Penny Oleksiak of Canada took the silver and Dana Vollmer of the United States claimed the bronze.
Michael Phelps will be going for his 23rd Olympic medal at the Rio Games.
As expected, Phelps was picked for the 4x100-meter freestyle relay Sunday night. He will swim the second leg, after Caeleb Dressel leads off the Americans.
Ryan Held goes third as the only holdover from the group that posted the second-fastest qualifying time during the preliminaries, a bit of a surprise after Anthony Ervin put up the quickest time among the afternoon swimmers.
Nathan Adrian, the country's best sprinter, will anchor the relay. The Americans figure to face a stout challenge from Australia, Russia and defending Olympic champion France, who are all breaking out their big guns for the 4x100.
Cameron McEvoy is anchoring for the Australians, Vladimir Morozov is going for the Russians, and the French have Florent Manaudou and Jeremy Stravius rested up and ready to go.
Sadiq Umar scored a first-half goal and Nigeria defeated Sweden 1-0 to become the first team to guarantee a spot in the quarterfinals of the men's soccer tournament.
Umar netted the winner in the 40th minute in the jungle city of Manaus to leave Nigeria atop Group B with six points, securing one of the top two spots in the group regardless of the result in its final game against Colombia.
In Group A, Robert Skov scored in the 69th-minute to give Denmark a 1-0 win over South Africa. Denmark squandered several good chances until Skov finally got on the board to leave his nation atop the group with four points from two games.
And Jonathan Calleri scored a 70th-minute winner to give 10-man Argentina a 2-1 victory over Algeria in Group D. Calleri also set up Angel Correa's goal in the 47th as Argentina won its first game and kept alive its chances of advancing to the quarterfinals.
Long Qingquan of China set a world record in winning the gold medal in the men's weightlifting 53-kilogram category at the Rio de Janeiro Games.
Long's total score of 307 kilograms set the record and was aided by his final lift in clean and jerk of 170 kilograms. The previous record was 305 kilograms set at the Sydney Games in 2000.
He was leading the competition after snatch and all the way through clean and jerk until Om Yun-Chol of North Korea lifted 169 kilograms on his final attempt to tie Long for the lead.
Long then came out for his final lift, raised his bar and celebrated the gold medal by pumping his fists in the air.
Om took silver with 303 kilograms and Sinphet Kruaithong of Thailand won bronze.
Dutch cyclist Annemiek van Vleuten sustained three small fractures to her spine and is in intensive care at a Rio de Janeiro hospital after her crash during the women's Olympic road race.
Van Vleuten was leading on the fast, slippery downhill toward the final stretch when she appeared to lock up her brakes. She tumbled onto the road and lay on the pavement as the field swept past.
Chef de Mission Maurits Hendriks and team doctors were with van Vleuten Sunday night, and said she was conscious and speaking. It was still unknown when she would be released.
Her compatriot Anna van der Breggen went on to win the gold medal.
Serena and Venus Williams lost an Olympic doubles match for the first time, stunned in the opening round of the Rio Games by the Czech Republic's Lucie Safarova and Barbora Strycova 6-3, 6-4.
The Williams sisters entered Sunday's match with a 15-0 career record in the Olympics, winning the gold medal in women's doubles every time they entered the event: in 2000, 2008 and 2012.
The American duo was seeded No. 1 in Rio and coming off a 14th Grand Slam championship together, at Wimbledon a month ago.
UPSET ALERT: Three-time doubles gold medalists Serena and Venus Williams lose in first round of Olympics.
The Egyptian women's beach volleyball team of Nada Meawad and Doaa Elghobashy took the court for their match against Germany on Sunday night wearing long sleeves and long pants.
Elghobashy also had her head covered by a hijab.
It was a stark contrast to the usual beach volleyball uniform - bikinis for women and boardshorts for men. Although the International Volleyball Federation used to have standards regulating the size of uniforms, those were loosened heading into the London Olympics to allow full sleeves and pants.
FIVB spokesman Richard Baker said Sunday night that the move was made to open up the game culturally.
By one measure, it's worked. Baker said there were 169 different countries involved in the Continental Cup qualifying process for the 2016 Olympic, compared to 143 for London.
The U.S. women's gymnastics team's going away party for national team coordinator Martha Karolyi is off to a near perfect start.
The women breezed to the top of the leaderboard in Olympic preliminaries Sunday afternoon. Their total score of 185.238 was nearly 10 better than second-place China through four subdivisions, a massive gap in a sport where the margins are often measured in fractions.
Three-time world champion Simone Biles led the way. Her all-around total of 62.366 was more than two points clear of teammate Aly Raisman.
Defending all-around champion Gabby Douglas finished third but will not compete in the all-around final due to rules that stipulate a two-gymnast maximum per country.
Karolyi is retiring after closing ceremonies. Her team put on a dominant display at Rio Olympic Arena, cementing their status as heavy favorites to back up the team gold the ''Fierce Five'' won in London four years ago.
New Zealand survived a tough encounter against an energized U.S. team to win their quarterfinal 5-0 and join world series champion Australia, Canada and Britain in playing off for the first Olympic medals in rugby sevens.
Rugby is back in the Olympics for the first time since the last 15-a-side tournament in 1924, this time in the condensed sevens format in Rio de Janeiro and with women's and men's medals at stake.
The Australians rebounded from a surprising 12-12 draw with the United States in the last game of the pool stage to trounce Spain 24-0 on Sunday night and set up a semifinal match against Canada.
The British advanced 26-7 over Fiji and then watched as semifinal opponent New Zealand struggled to put away the Americans. Portia Woodman's try broke the deadlock for New Zealand just before halftime.
The Americans dropped into the classification matches for 5th-8th places.
AP Summer Games website: http://summergames.ap.org