Day 11 of the Rio Games features medal action in gymnastics, track and field, boxing, wrestling and more. Here are some events to watch (all times local):
Simone Biles can wrap up her remarkable time in Rio with a fourth Olympic gold medal when she competes in the floor exercise at 2:47 p.m.
Biles has already earned three golds and a bronze, though her chance to become the first female gymnast to capture five golds in a single Olympics ended when she wobbled during the balance beam final on Monday and ended up with bronze.
Biles is the reigning world champion in the floor exercise. Her biggest competition will come from teammate Aly Raisman, who captured gold in London four years ago. Biles and Raisman went 1-2 in the all-around competition last week.
The men will wrap up the Olympics with the high bar at 2 p.m. and parallel bar finals at 3:34 p.m. Oleg Verniaiev, who came in second to Kohei Uchimura in the men's all-around, leads the field on parallel bars. Epke Zonderland of the Netherlands will try to defend his Olympic title on high bar.
TRACK AND FIELD
After a day off, Usain Bolt returns to the track in his quest for more gold — in his favorite event, too: the 200 meters.
"I'm always confident going into the 200 meters," said Bolt, who surged past Justin Gatlin to win the 100 on Sunday. "I think the 100 meters is always the hardest one for me. Going to the 200 now, I'm very confident." Then again, the fastest man on the planet has never lacked for confidence. He runs in the ninth heat at 12:46 p.m.
Also Tuesday, American Christian Taylor will defend his triple jump title. The competition begins at 9:50 a.m.
Keep an eye on Jamaican Omar McLeod and American Devon Allen , the University of Oregon football/track standout, in the 110-meter hurdles. The finals are at 10:45 p.m. following semifinals starting at 8:40 p.m.
Medals also will be awarded in women's discus (11:20 a.m.), the women's 1500 meters (10:30 p.m.) and the men's high jump (8:30 p.m.).
The U.S. women's team begins knockout play against Japan when the two teams play in the quarterfinals at 6:45 p.m. The Americans have won 46 consecutive games in the Olympics and are three victories away from a sixth consecutive gold medal. They cruised through pool play , winning the five games by an average of 40.8 points.
The U.S. hasn't faced Japan since the 1996 quarterfinals when the Americans won by 15 points. Japanhas been the surprise of the tournament, already matching its three victories in 1996 in the Atlanta Games. The Japanese also have the rare distinction of being the only team left playing in the Olympics who have beaten the U.S., although that came back in 1976.
In other quarterfinal games, Australia plays Serbia at 11 a.m., Spain plays Turkey at 2:30 p.m., and France faces Canada at 10:15 p.m.
Kerri Walsh Jennings and April Ross play for a spot in the gold-medal game when they meet Brazilian world champions Agatha and Barbara in the beach volleyball semifinals at 11:59 p.m.
Walsh Jennings is going for her fourth gold, and Ross is looking to improve on the silver she earned when she lost to her fellow Americans in the London final. Brazil has three entries in Tuesday's men's and women's semifinals, including Alison and Bruno, who eliminated the American men's team of Phil Dalhausser and Nick Lucena in the round of eight. They play the Dutch team of Alexander Brouwer and Robert Meeuwsen at 5 p.m.
Marta and Brazil are a win away from the gold-medal match, but the team will first have to overcome a pumped up Sweden team that knocked off the three-time defending champion United States in the quarterfinals. They play at 1 p.m.
Tuesday's other semifinal match, between Canada and Germany, will be held at 4 p.m.
Canada , which won bronze four years ago, is the only team from the medal round at the London Games to return to the semifinals in Brazil.
The top-ranked U.S. women's volleyball team , which went 5-0 in Olympic group play, faces Japan in a quarterfinal matchup at 2 p.m. as the Americans try to move one step closer to the first gold in program history.
Japan is arguably the best defensive team in this tournament.
Two-time reigning Olympic champion and host Brazil will take on a young China team in the 10:15 p.m. match, while the upstart Netherlands women — back in their first Olympics in 20 years and 4-1 in group play behind the Americans — face South Korea at 10 a.m.
Nicola Adams, the British flyweight who won the first gold medal in Olympic women's boxing history, opens the slate with her first bout of the tournament. She faces Tetyana Kob of Ukraine at 11 a.m.
Shakur Stevenson and Gary Russell have fights early in the day for an American team trying to make up for an 0-2 effort on Monday. The main event of a 19-fight card has Brazilian Robson Conceicao fighting Frenchman Sofiane Oumiha for Olympic gold in the lightweight division. That fight starts at 7:15 p.m.
The track cycling program concludes Tuesday night with Britain seeking more Olympic gold. Jason Kenny is going for his third title of the Rio Games in the keirin at 6:14 p.m., Katy Marchant and Becky James are still alive in the individual sprint at 6:26 p.m., and Laura Trott is favored to defend her title in the women's omnium at 5:05 p.m. Italian Elia Viviani won the men's event Monday despite being taken out in a crash that claimed two other riders. The powerhouse British team has already won four gold medals through seven events inside the velodrome.
OPEN WATER SWIMMING
A day after Brazil won its first swimming medal of the games — a bronze in the women's open water event — the men take to the sewage-filled waters off Copacabana beach for their 10K race.
This is only the second Olympics holding competition in open ocean waters. At the first Summer Games in 1896, before custom-built pools were the norm, swimming was held in the Bay of Zea. The inaugural open water event in 2008 was staged at Beijing's rowing and canoeing canal. Four years ago, the open water in London took place in the Serpentine lake at Hyde Park.
Brazil's Poliana Okimoto went from just off the podium to bronze when France's Aurelie Muller was disqualified for colliding with another swimming. The first swimming medal ever won by a Brazilian woman, either in the pool or open water, eased some of the sting from a disappointing performance by the pool swimmers, who failed to win a medal at their home Olympics.