Rio 2016: Five things to watch Monday

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Allyson Felix talks about obstacles she's overcome (2016)

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Olympic champions go over their routines

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Brazil celebrates Olympic gold in men's football

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Rio Olympics 2016: Why all the empty seats?

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Olympic twins rebuked for finishing race holding hands

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U.S. gymnast Simone Biles won a record-tying four gold medals and one bronze as she dazzled the crowd with a mix of elegance and athleticism rarely seen in the sport.

Simone Biles wins fourth gold in Rio Olympics

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Where is the brand competition at the Olympics?

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Tommie Smith reflects on the 1968 Olympics

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Jamaica's Usain Bolt (C) jokes with Canada's Andre De Grasse (L) after they crossed the finish line in the Men's 200m Semifinal during the athletics event at the Rio 2016 Olympic Games at the Olympic Stadium in Rio de Janeiro on August 17, 2016. / AFP / OLIVIER MORIN (Photo credit should read OLIVIER MORIN/AFP/Getty Images)

Usain Bolt cracks joke crossing finish line

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European Olympic Committee (EOC) President Patrick Hickey gives a press conference after the EOC's 37th general assembly in Istanbul on November 22, 2008. AFP

European Olympic head arrested in alleged ticket scam

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See Simone Biles get a kiss from celebrity crush

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RIO DE JANEIRO, BRAZIL - AUGUST 08: Kerri Walsh Jennings of United States celebrates during the Women's Beach Volleyball preliminary round Pool C match against Fan Wang and Yuan Yue of China on Day 3 of the Rio 2016 Olympic Games at the Beach Volleyball Arena on August 8, 2016 in Rio de Janeiro, Brazil. (Photo by Ezra Shaw/Getty Images)

Kerri Wash Jennings dominates olympic beach volleyball

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RIO DE JANEIRO, BRAZIL - AUGUST 16: Giles Scott of Great Britain celebrates winning the gold medal in the Finn class on Day 11 of the Rio 2016 Olympic Games at the Marina da Gloria on August 16, 2016 in Rio de Janeiro, Brazil. (Photo by Clive Mason/Getty Images)

British sailing gold medalist talks Rio Olympics

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South African stuns the world at Rio Olympics

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Yulia Efimova: America has changed me

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RIO DE JANEIRO, BRAZIL - AUGUST 08: Ibtihaj Muhammad of the United States looks on during the Women's Individual Sabre on Day 3 of the Rio 2016 Olympic Games at Carioca Arena 3 on August 8, 2016 in Rio de Janeiro, Brazil. (Photo by Patrick Smith/Getty Images)

Muslim-American athelete makes history at the Olympics

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China's Fu Yuanhui poses with her bronze medal on the podium of the Women's 100m Backstroke during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 8, 2016. / AFP / GABRIEL BOUYS (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)

Chinese swimmer praised for challenging taboo

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Michael Phelps cements Olympic legacy in Rio

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Usain Bolt's smile cracks up the Internet

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RIO DE JANEIRO, BRAZIL - AUGUST 09: (R to L) Gold Medalists Simone Biles, Gabrielle Douglas, Lauren Hernandez, Madison Kocian and Alexandra Raisman of the United States stand on the podium for the national anthem at the medal ceremony for the Artistic Gymnastics Women's Team Final on Day 4 of the Rio 2016 Olympic Games at the Rio Olympic Arena on August 9, 2016 in Rio de Janeiro, Brazil. (Photo by Alex Livesey/Getty Images)

Heated debate over Olympic podium moment

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Podium proposal at Rio Olympics

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BEIJING, CHINA - AUGUST 27: Usain Bolt of Jamaica celebrates after crossing the finish line to win gold in the Men's 200 metres final during day six of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 27, 2015 in Beijing, China. (Photo by Cameron Spencer/Getty Images)

Usain Bolt is...

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Douglas produced an astonishing showing at the London 2012 Games with a performance which belied her years.

Mom: Online criticism devastated Gabby Douglas

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Jennifer Bolt: The gold medal mom

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Security concerns ahead of Olympics

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15-year-old Michael Phelps: I don't have a normal life

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TOPSHOT - USA's Michael Phelps kisses his gold medal on the podium of the Men's 4x100m Freestyle Relay Final during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 7, 2016. / AFP / GABRIEL BOUYS (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)

Michael Phelps is ...

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Lone Russian long jumper suspended from Rio games

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2012 Heptathlon champion hopes for a repeat in Rio

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RIO DE JANEIRO, BRAZIL - AUGUST 12: Katie Ledecky of the United States leads the field in the Women's 800m Freestyle Final on Day 7 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 12, 2016 in Rio de Janeiro, Brazil. (Photo by Adam Pretty/Getty Images)

Ledecky crushes rivals, wins gold medal

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Two Simones earn gold at Olympics

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US women's soccer team loses to Sweden in Rio

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From Favela to Olympic gold

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RIO DE JANEIRO, BRAZIL - AUGUST 06: Xinyi Chen of China competes in heat four of the Women's 100m Butterfly on Day 1 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on on August 6, 2016 in Rio de Janeiro, Brazil. (Photo by Lars Baron/Getty Images)

Chinese swimmer fails doping test in Rio

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Rio athletes deal with water full of sewage and trash

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Which nation sent only 2 athletes to Rio?

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Olympic dream comes true for Palestinian swimmer

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Lochte vs. Phelps: An end to a 12-year rivalry

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RIO DE JANEIRO, BRAZIL - AUGUST 11: Michael Phelps of the United States celebrates winning the Men's 200m Individual Medley Final on Day 6 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 11, 2016 in Rio de Janeiro, Brazil. (Photo by Al Bello/Getty Images)

How do elite athletes conquer their nerves?

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Who holds the most incredible Olympic record?

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Simone Biles amazes teammates

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Russian swimming head talks Yulia Efimova, doping

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The water of the diving pool at right appears a murky green as the water polo pool at left appears a greener colour than the previous day during a preliminary round match between United States and France in the Maria Lenk Aquatic Center at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Wednesday, Aug. 10, 2016. (AP Photo/Matt Dunham)

A 2nd Olympic pool in Rio turns green

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Japan's Uchimura, US' Ledecky thrill fans

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The favela that raised Brazil's golden girl

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Discovering the heart of Rio's art scene

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Heptathlete Jess Ennis-Hill on doping and clean sports

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Aussies go wild for Kyle Chalmers

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Day 5 of the Olympics: Finals are heating up

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Golf has returned to the Olympics

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Brazil's Rafaela Silva wins gold in women's judo

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RIO DE JANEIRO, BRAZIL - AUGUST 09: Michael Phelps of the United States celebrates winning gold in the Men's 200m Butterfly Final on Day 4 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 9, 2016 in Rio de Janeiro, Brazil. (Photo by Phil Walter/Getty Images)

Michael Phelps wins 21st gold medal

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How they make Olympic medals

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Pictures of Serena Williams losing today

Serena Williams knocked out of Rio Olympics

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Majlinda Kelmendi winning gold medal for Kosovo

Judo champ thrills Kosovo with first ever gold medal

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How fast does an Olympic boxer punch?

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American Lilly King defeats Russia's Efimova for gold

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All eyes on US women's gymnastics team

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Usain Bolt: I will be 'fully accomplished' after Rio

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Russia supporters look on as a US team member drapes a US flag during the swimming competitions at the 2016 Summer Olympics, Sunday, Aug. 7, 2016, in Rio de Janeiro, Brazil. (AP Photo/Martin Meissner)

Russian athletes booed at Rio Olympics

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What US Olympic athletes eat to get ready for Rio 2016

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41-year-old gymnast competes in 7th Olympics

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An overview shows France's Samir Ait Said being stretchered off after being injured while competing in the qualifying for the men's vault event of the Artistic Gymnastics at the Olympic Arena during the Rio 2016 Olympic Games in Rio de Janeiro on August 6, 2016. / AFP / Antonin THUILLIER (Photo credit should read ANTONIN THUILLIER/AFP/Getty Images)

French gymnast breaks leg during vault in Rio

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U.S. athletes show off their Olympic tattoos

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Beach volleyball star: Olympics are like childbirth

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Refugee swimmer aims for the Olympics

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LONDON, ENGLAND - AUGUST 05: Sanya Richards-Ross of the United States celebrates winning gold in the Women's 400m Final on Day 9 of the London 2012 Olympic Games at the Olympic Stadium on August 5, 2012 in London, England. (Photo by Alexander Hassenstein/Getty Images)

Sonya Richards-Ross talks to CNN

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RIO DE JANEIRO, BRAZIL - AUGUST 01: The sun sets over the Olympic Rings on the Olympic Park on August 1, 2016 in Rio de Janeiro, Brazil. (Photo by Clive Rose/Getty Images)

Russian athletes barred from Paralympic Games

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Egyptian fencer chases Olympic history

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The girl from Ipanema lights torch

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What the Olympics means to the American athletes

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Lebanese Trap Champion Ray Bassil gives a thumbs-up sign as she trains for the 2012 Summer Olympic Games in London at a shooting club in Ghadras north of Beirut on July 13, 2012. AFP PHOTO/JOSEPH EID (Photo credit should read JOSEPH EID/AFP/GettyImages)

Meet the world's #1 female trap shooter

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Meet Ibtihaj Muhammad

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Team USA Olympic uniforms receive heat on social media

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Inside Rio's no-go drug zone

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Rio 2016: New records and big surprises Monday