Rio 2016 Olympics: Day 1 as it happened | CNN

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Who holds the most incredible Olympic record?

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Rio 2016 Olympics 92 videos

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Who holds the most incredible Olympic record?

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Olympic champions go over their routines

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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.

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Simone Biles wins fourth gold in Rio 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)

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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

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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)

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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)

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British sailing gold medalist talks Rio Olympics

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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)

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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)

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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)

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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)

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Usain Bolt is...

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

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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)

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Michael Phelps is ...

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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)

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Ledecky crushes rivals, wins gold medal

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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)

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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)

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Simone Biles amazes teammates

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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)

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A 2nd Olympic pool in Rio turns green

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Japan's Uchimura, US' Ledecky thrill fans

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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)

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Michael Phelps wins 21st gold medal

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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)

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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)

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French gymnast breaks leg during vault in Rio

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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)

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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)

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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)

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A man disguised as Batman holds a fake Olympic torch reading "Shame" during a protest against suspended president Dilma Rousseff and former president Luiz Inacio Lula Da Silva, at Copacabana beach in Rio de Janeiro, Brazil, on July 31, 2016.
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Polluted water and the Zika virus had been the major health concerns in the run-up to the Rio Olympics.

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PERTH, AUSTRALIA - DECEMBER 07: Scott Giles of Great Britain competes in the Finn Yellow fleet on the Leighton Course during day five of the 2011 ISAF Sailing World Championships on December 7, 2011 in Perth, Australia.. (Photo by Mark Dadswell/Getty Images)

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CNN —

After Friday’s showstopping opening ceremony, the Rio 2016 Olympics began with action and drama.

Day one’s highlights included: (Mobile app users can best follow the blog here)

• Aquatic grudge match and records smashed in the pool

• French gymnast suffers horror injury

• U.S. teen Ginny Thrasher wins first gold of Games in women’s 10-meter air rifle

Recap all the action below and at our Olympics hub: