Michael Phelps adds to his Olympic record total by winning his 19th Gold Medal, in the Men's 4x100m Freestyle Relay, at the 2016 Rio Olympics. Aug. 7, 2016, Rio de Janeiro.

Katie Ledecky of the United States is far ahead of the competition during the Women's 400m Freestyle Final at the Olympic Aquatics Stadium on Aug. 7, 2016 in Rio de Janeiro, Brazil. Ledecky shattered her own world record, finishing nearly 5 seconds ahead of the silver medalist.

Teofimo Andres Lopez Rivera of Honduras reacts after losing his men's 60kg boxing match to Sofiane Oumiha of France. 2016 Rio Olympics, Aug. 7, 2016, Rio de Janeiro, Brazil.

Marcia Vidiaux of Cuba competes on the balance beam during Women's qualification for Gymnastics on Day 2 of the Rio 2016 Olympic Games at the Rio Olympic Arena on Aug. 7, 2016 in Rio de Janeiro, Brazil

Aiko Sugihara of Japan competes on the floor exercise during the women's gymnastics qualifications. 2016 Rio Olympics, Aug. 7, 2016, Rio de Janeiro, Brazil.

France's Sofiane Oumiha (L) lands a punch on Honduras' Teofimo Andres Lopez Rivera during the Men's Light (60kg) match at the Rio 2016 Olympic Games at the Riocentro Pavilion 6 in Rio de Janeiro on Aug. 7, 2016.

Poland's Maciej Okreglak competes in the Men's K1 kayak slalom competition at the Whitewater stadium during the Rio 2016 Olympic Games in Rio de Janeiro on Aug. 7, 2016.

Sarah Sjostrom of Sweden celebrates after setting a new world record in the women's swimming 100m butterfly event. 2016 Rio Olympics, Aug. 7, 2016, Rio de Janeiro, Brazil.

Brazil's Wallace Leandro De Souza (L) goes high for a spike during the men's qualifying volleyball match between Brazil and Mexico at the Maracanazinho stadium in Rio de Janeiro on Aug. 7, 2016, for the 2016 Rio Olympics.

Australia's Emma Tonegato, front, scores a try as USA's Alev Kelter tries to defend during the women's rugby sevens match at the Summer Olympics in Rio de Janeiro, Brazil, Aug. 7, 2016.

Argentina's Federico Pizarro tries to score a penalty during the men's preliminary handball match between Denmark and Argentina at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Sunday, Aug. 7, 2016.

Lasse Svan of Denmark and Goalkeeper Matias Carlos Schulz of Argentina in action, men's preliminary group A handball competition. 2016 Rio Olympics, Aug. 7, 2016, Rio de Janeiro, Brazil.

Denmark's goalkeeper Niklas Landin Jacobsen watches the ball into his net during the men's preliminaries Group A handball match Denmark vs Argentina for the Rio 2016 Olympics Games at the Future Arena in Rio on August 7, 2016.

Simone Biles of the USA competes on the beam during the women's gymnastics qualifications. 2016 Rio Olympics, Aug. 7, 2016, Rio de Janeiro, Brazil.

Austria's Mario Leitner competes in the Men's K1 kayak slalom competition at the Whitewater stadium during the Rio 2016 Olympic Games in Rio de Janeiro on Aug. 7, 2016.

USA's Katie Meili competes in the Women's 100m Breaststroke heats during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 7, 2016.

Spain's Bergonia Garcia, left, falls as she fights for the ball with Margot Van Geffen the 2016 Summer Olympics in Rio de Janeiro, Brazil, Aug. 7, 2016.

Serena Williams, of the United States, reaches for a return in her tennis match against Daria Gavrilova, of Australia, at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Aug. 7, 2016.

Russia's Daria Spiridonova performs on the uneven bars during the artistic gymnastics women's qualification at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Aug. 7, 2016.

Merdan Atayev of Turkmenistan competes in the men's 100m backstroke swimming heat. 2016 Rio Olympics, Aug. 7, 2016, Rio de Janeiro, Brazil.

The hand prints of Vanessa Ferrari of Italy are seen on the ground during the women's gymnastics qualifications. 2016 Rio Olympics, Aug. 7, 2016, Rio de Janeiro, Brazil.

A rower arrives for a training session before the race at the Lagoa Rodrigo de Freitas in Rio de Janeiro during the Rio 2016 Olympic Games on Aug. 7, 2016.

The peloton rides along Ipanema beach during the women's cycling road race final at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Aug. 7, 2016.

Supporters take pictures as they cheer for their team during the men's qualifying volleyball match between Brazil and Mexico at the Maracanazinho stadium in Rio de Janeiro on August 7, 2016, for the Rio 2016 Olympic Games.

Christopher Reid of South Africa competes in the men's 100m backstroke qualifying heats, at Olympics Aquatic Stadium. 2016 Rio Olympics, Aug. 7, 2016, Rio de Janeiro, Brazil.

Argentina's Federico Grabich competes in the Men's 200m Freestyle heat during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on Aug. 7, 2016.

Fernando (L) of Portugal change the match jersey with Alberth Elis of Honduras after the Men's Group D first round match between Honduras and Portugal during the Rio 2016 Olympic Games at the Olympic Stadium on Aug. 7, 2016 in Rio de Janeiro, Brazil.

Ruggero Tita and Pietro Zucchetti of Italy train in the 49er class men's sailing. 2016 Rio Olympics, Aug. 7, 2016, Rio de Janeiro, Brazil.

Lely Burgos of Puerto Rico reacts after a successful lift in the 53kg women's weightlifting competition. 2016 Rio Olympics, Aug. 7, 2016. Rio de Janeiro, Brazil.

Sherine Elzeiny of Egypt looks on during Women's qualification for women's gymnastics on Day 2 of the Rio 2016 Olympic Games at the Rio Olympic Arena on August 7, 2016 in Rio de Janeiro, Brazil.

Seychelles' Andrique Allisop, right, fights Ireland's David Joyce during a men's lightweight 60-kg preliminary boxing match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Aug. 7, 2016.

Fabio Basile of Italy performs a flip as he celebrates winning the gold medal against Baul An of Korea during the Men's -66kg gold medal final on Day 2 of the Rio 2016 Olympic Games at Carioca Arena 2 on Aug. 7, 2016 in Rio de Janeiro, Brazil.

Tania Cagnotto of Italy and Francesca Dallape of Italy compete in women's synchronized 3m springboard diving. 2016 Rio Olympics, Aug. 7, 2016, Rio de Janeiro, Brazil.

This multiple exposure image shows Nigeria's Quadri Aruna serving in his men's singles qualification round table tennis match at the Riocentro venue during the Rio 2016 Olympic Games in Rio de Janeiro on Aug. 7, 2016.

Zsofia Kovacs of Hungary competes on the balance beam during the women's Individual All-Around qualification of the Rio 2016 Olympic Games Artistic Gymnastics events at the Rio Olympic Arena in Barra da Tijuca, Rio de Janeiro, Brazil, Aug. 7, 2016.

Erika Fasana of Italy competes on the uneven bars during Women's qualification for Artistic Gymnatics on Day 2 of the Rio 2016 Olympic Games at the Rio Olympic Arena on Aug. 7, 2016 in Rio de Janeiro, Brazil.

Elisa Meneghini of Italy competes on the balance beam during Women's qualification for Artistic Gymnatics on Day 2 of the Rio 2016 Olympic Games at the Rio Olympic Arena on Aug. 7, 2016 in Rio de Janeiro, Brazil.

Haline Leme Scatrut of Brazil tackles Marie Yamaguchi of Japan during the women's pool C rugby match. 2016 Rio Olympics, Aug. 7, 2016, Rio de Janeiro, Brazil.

Great Britain's Richard Kruse (L) competes against Algeria's Victor Hamid Sintes during their mens individual foil qualifying bout as part of the fencing event of the Rio 2016 Olympic Games, on Aug. 7, 2016, at the Carioca Arena 3, in Rio de Janeiro.

Alessandra Perilli, of San Marino, competes during the trap women's qualification at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Sunday, Aug. 7, 2016.

Ana Maria Rendon of Columbia against India the women's team competition of the Rio 2016 Olympic Games Archery events at the Sambodromo in Rio de Janeiro, Brazil, Aug. 7, 2016.

A tear runs down the face of Russia's Angelina Melnikova as she leaves the arena after competing in the artistic gymnastics women's qualification at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Sunday, Aug. 7, 2016.

Hongxia Li of China falls after a shot on goal during the women's field hockey pool A match between China and Germany on Day 2 of the Rio 2016 Olympic Games at the Olympic Hockey Centre on Aug. 7, 2016 in Rio de Janeiro, Brazil.

Jim Gottfridsson (C) of Sweden in action against Patrick Wiencek (L) and Hendrik Pekeler (R) of Germany during the men's Handball preliminary round game between Sweden and Germany at the Rio 2016 Olympic Games at the Future Arena in the Olympic Park in Rio de Janeiro, Brazil, Aug. 7, 2016.

USA's Kathryn Johnson tackles Australia's Ellia Green in the womens rugby sevens match between Australia and USA during the Rio 2016 Olympic Games at Deodoro Stadium in Rio de Janeiro on Aug. 7, 2016.

Joao Victor Marcari Oliva, of Brazil, practices on a horse at the Olympic Equestrian Center during the 2016 Summer Olympics in Rio de Janeiro, Brazil, Sunday, Aug. 7, 2016.

Russia's gymnasts attend the qualifying at the Artistic Gymnastics at the Olympic Arena during the Rio 2016 Olympic Games in Rio de Janeiro on Aug. 7, 2016.

Russia's Daria Spiridonova attends the qualifying at the Artistic Gymnastics at the Olympic Arena during the Rio 2016 Olympic Games in Rio de Janeiro on Aug. 7, 2016.

Members of the United States Olympic Team sit on the bench during a Women's Preliminary Round basketball game between the United States and Senegal on day 2 of the Rio 2016 Olympics at Carioca Arena 1 on Aug. 7, 2016 in Rio de Janeiro, Brazil.

Lisa Altenburg of Germany celebrates scoring a goal during the women's pool A field hockey competition against China. 2016 Rio Olympics, Aug. 7, 2016, Rio de Janeiro, Brazil.

Diana Taurasi (C) and Seimone Augustus (R) of the United States women's basketball team, celebrate with teammates during the fourth quarter of their game against Senegal. 2016 Rio Olympics, Aug. 7, 2016, Rio de Janeiro, Brazil.