United States' Brianna Rollins competes in a women's 100-meter hurdles heat during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Tuesday, Aug. 16, 2016. (AP Photo/Lee Jin-man)





United States' Simone Biles performs on the floor during the artistic gymnastics women's apparatus final at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, August 16, 2016. (Photo by Dmitri Lovetsky/AP Photo)





Guyana's Troy Doris reacts to a jump in the triple jump finals during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Tuesday, August 16, 2016. (Photo by Morry Gash/AP Photo)





2016 Rio Olympics, Table Tennis, Men's Team, Semifinals, Riocentro, Pavilion 3, Rio de Janeiro, Brazil on August 16, 2016. Zhang Jike (CHN) of China uses a paddle to lob balls into the audience after winning their match against South Korea. (Photo by Alkis Konstantinidis/Reuters)





2016 Rio Olympics, Athletics, Final, Men's Pole Vault Final, Olympic Stadium, Rio de Janeiro, Brazil on August 15, 2016. Water splashes up as Sam Kendricks (USA) of USA lands after a jump. (Photo by Alessandro Bianchi/Reuters)





2016 Rio Olympics, Sailing, Final, Women's One Person Dinghy, Laser Radial, Medal Race, Marina de Gloria - Rio de Janeiro, Brazil on August 16, 2016. Marit Bouwmeester (NED) of Netherlands celebrates gold medal. (Photo by Brian Snyder/Reuters)





2016 Rio Olympics, Soccer, Semifinal, Women's Football Tournament Semifinal Brazil vs Sweden, Maracana, Rio de Janeiro, Brazil on August 16, 2016. Andressa (BRA) of Brazil (L), Tamires (BRA) of Brazil and Kosovare Asllani (SWE) of Sweden compete. (Photo by Bruno Kelly/Reuters)





Blood covered Russia's Vladimir Nikitin reacts to winning against Ireland's Michael John Conlan during the Men's Bantam (56kg) Quarterfinal 1 match at the Rio 2016 Olympic Games at the Riocentro – Pavilion 6 in Rio de Janeiro on August 16, 2016. (Photo by Yuri Cortez/AFP Photo)





Eliza Mccartney of New Zealand competed in the Women's Pole Vault qualification on Day 11 of the Rio 2016 Olympic Games at the Olympic Stadium on August 16, 2016 in Rio de Janeiro, Brazil. (Photo by Cameron Spencer/Getty Images)





Turkey's Lara Sanders sits on the bench after a quarterfinal round basketball game loss to Spain, August 16, 2016. (Photo by Charlie Neibergall/AP Photo)





Puerto Rico's Grace Claxton warms up before competing in the Women's 400m Hurdles Round 1 during the athletics event at the Rio 2016 Olympic Games at the Olympic Stadium in Rio de Janeiro on August 15, 2016. (Photo by Jewel Samad/AFP Photo)





Laura Ludwig (R) and Kira Walkenhorst of Germany celebrate after defeating Larissa Franca Maestrini and Talita Rocha of Brazil during their Rio 2016 Olympic Games Women's Semifinal at the Beach Volleyball Arena on Copacabana Beach in Rio de Janeiro, Brazil, 16 August 2016. (Photo by Orlando Barria/EPA)





Britain's Laura Trott (R) reacts next to her fiance Britain's Jason Kenny after he won the Men's Keirin finals track cycling event at the Velodrome during the Rio 2016 Olympic Games in Rio de Janeiro on August 16, 2016. (Photo by Odd Andersen/AFP Photo)





Jordan Wilimovsky, of United States, competes in the men's marathon event at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, August 16, 2016. (Photo by Felipe Dana/AP Photo)





China's Wang Yan performs on the floor during the artistic gymnastics women's apparatus final at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, August 16, 2016. (Photo by Rebecca Blackwell/AP Photo)





Michael Witaker of Great Britain riding Cassionato performs during the Jumping Individual competition of the Rio 2016 Olympic Games Equestrian events at the Olympic Equestrian Centre in Rio de Janeiro, Brazil, 16 August 2016. (Photo by Jim Hollander/EPA)





Laura Ludwig of Germany reacts as she and Kira Walkenhorst play Larissa Franca Maestrini and Talita Rocha of Brazil during their Rio 2016 Olympic Games Women's Semifinal at the Beach Volleyball Arena on Copacabana Beach in Rio de Janeiro, Brazil, 16 August 2016. (Photo by Mario Ruiz/EPA)





Bojana Zivkovic (R) of Serbia embraces teammate Silvija Popovic (C) as they celebrate winning during the women's quarterfinals Volleyball match of the Rio 2016 Olympic Games between Russia and Serbia at Maracanazinho indoor arena in Rio de Janeiro, Brazil, 16 August 2016. (Photo by Michael Reynolds/EPA)





Wilma Murto (back) of Finland and Yarisley Silva (front) of Cuba compete during the women's Pole Vault qualification of the Rio 2016 Olympic Games Athletics, Track and Field events at the Olympic Stadium in Rio de Janeiro, Brazil, 16 August 2016. (Photo by Peter Klaunzer/EPA)





Spanish players react after being defeated by France at the end of the women's quarterfinal handball match Spain vs France for the Rio 2016 Olympics Games at the Future Arena in Rio on August 16, 2016. (Photo by Javier Soriano/AFP Photo)





Netherlands' Epke Zonderland falls as he competes in the men's Horizontal bar event final of the Artistic Gymnastics at the Olympic Arena during the Rio 2016 Olympic Games in Rio de Janeiro on August 16, 2016. (Photo by Ben Stansall/AFP Photo)





Canada's Christabel Nettey makes an attempt in the women's long jump qualification during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Tuesday, August 16, 2016. (Photo by Matt Slocum/AP Photo)





Russia's Darya Klishina makes an attempt in the women's long jump qualification during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Tuesday, August 16, 2016. (Photo by Matt Slocum/AP Photo)





Brazil's Agatha Bednarczuk, center, celebrates a point against the United States with teammate Barbara Seixas de Freitas during a women's beach volleyball semifinal match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Wednesday, August 17, 2016. (Photo by Marcio Jose Sanchez/AP Photo)





Thailand's Peamwilai Laopeam, right, bows to judges as Colombia's Ingrit Lorena Valencia Victoria celebrates after winning a women's flyweight 51-kg quarterfinals boxing match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, August 16, 2016. (Photo by Jae C. Hong/AP Photo)





United States' Simone Biles displays her gold medal for floor during the artistic gymnastics women's apparatus final at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, August 16, 2016. (Photo by Rebecca Blackwell/AP Photo)





Alexandra Popp of Germany hits the ground after a tackle during the women's semifinal soccer match between Germany and Canada, August 16, 2016. (Photo by Pedro Vilela/Getty Images)





United States' Sydney McLaughlin competes in a women's 400-meter hurdles heat during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Monday, August 15, 2016. (Photo by Lee Jin-man/AP Photo)





Germany's Melanie Leupolz and Canada's Janine Beckie, right, go for a header during a semifinal match of the women's Olympic football tournament between Germany and Canada at the Mineirao Stadium in Belo Horizonte, Brazil, Tuesday, August 16, 2016. (Photo by Leo Correa/AP Photo)





Germany's Laura Ludwig, left, and Kira Walkenhorst celebrate after beating Brazil during a women's beach volleyball semifinal match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, August 16, 2016. (Photo by Marcio Jose Sanchez/AP Photo)





Kenya's Faith Chepngetich Kipyegon crosses the line to win the gold medal in the women's 1500-meter final during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Tuesday, August 16, 2016. (Photo by David J. Phillip/AP Photo)





New Zealand's Blair Tuke, right, and Peter Burling after winning the 49er men gold medal at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, August 16, 2016. (Photo by Bernat Armangue/AP Photo)





Brazil's Sheilla Castro de Paula Blassioli, right, reacts after a score in a women's quarterfinal volleyball match against China at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, August 16, 2016. (Photo by Robert F. Bukaty/AP Photo)





Maryna Kylypko of Ukraine competes during the Women's Pole Vault Qualifying Round - Group A on Day 11 of the Rio 2016 Olympic Games at the Olympic Stadium on August 16, 2016 in Rio de Janeiro, Brazil. (Photo by Shaun Botterill/Getty Images)





Shanice Craft of Germany competes during the Women's Discus Throw Final on Day 11 of the Rio 2016 Olympic Games at the Olympic Stadium on August 16, 2016 in Rio de Janeiro, Brazil. (Photo by Ian Walton/Getty Images)





Fernando Saraiva Reis, of Brazil, prepares to attempt a lift in the men's +105 kg weightlifting event at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, August 16, 2016. (Photo by Mike Groll/AP Photo)