Japanese swimmer Kosuke Hagino prepares to compete in the men's 200m freestyle semifinalChristophe Simon/AFP

Lithuanian gymnast Robert Tvorogal competes on the vaultEmmanuel Dunand/AFP

Chinese boxer Zhao Minggang of China reacts as he is spongedPeter Cziborra/Reuters

Mathlynn Sasser of Marshall Islands celebrates int he women's 58kg weightlifting competition. REUTERS/Yves Herman

Chinese gymnast Chaopan Lin of China competes on the parallel barsAlex Livesey/Getty Images

Laura Giombini of Italy reacts during their women's beach volleyball match against CanadaShaun Botterill/Getty Images

Croatian water polo player Andro Buslje competes against MontenegroLaszlo Balogh/Reuters

Giorgio Avola of Italy celebrates winning his foil match. REUTERS/Issei Kato

France's Sofiane Oumiha lands a punch on Honduras' Teofimo Andres Lopez Rivera during the men's light (60kg) matchYuri Cortez/AFP

Russian gymnast Nikita Nagornyy competes on the vault during the men's team finalRyan Pierse/Getty Images

Michael Phelps of the United States prepares for the second semifinal of the men's 200m butterflyAl Bello/Getty Images

Slovakia's Barbora Balazova eyes the ball in her singles qualification round table tennis matchJuan Mabromata/AFP

Kacper Majchrzak of Poland reacts following the men's 200m freestyle finalJulian Finney/Getty Images

USA's April Ross dives during their women's beach volleyball qualifying match against ChinaLeon Neal/AFP

Yosuke Nakayama of Japan reacts after an unsuccessful lift in the men's 62kg weightliftingYves Herman/Reuters

Poland's Malgorzata Kozaczuk reacts after losing to Tunisia's Azza Besbes in their womens individual . (Photo by Kirill Kudryavtsev/AFP Photo)

Michael Phelps of the U.S. celebrates as his 4 x 100m freestyle relay won the gold. REUTERS/Stefan Wermuth

Austria's Alexander Huber reacts during their men's beach volleyball qualifying match against the USAYasuyoshi Chiba/AFP

Netherlands' Robin De Kruijf (L) and Netherlands' Lonneke Sloetjes react following the women's qualifying volleyball match between China and the Netherlands. (Photo by Pedro Ugarte/AFP Photo)

Chang Hye-Jin of South Korea competes in the women's archery eventYves Herman/Reuters

Oscar Albeiro Figueroa Mosquera of Colombia reacts during the men's 62kg group A weightlifting contestLars Baron/Getty Images

Romania's Corina Caprioriu reacts after losing to Portugal's Telma Monteiro during their women's –57kg judo contestToshifumi Kitamura/AFP

US gymnast Simone Biles smiles during a practice session of the women's Artistic gymnastics (Photo by Emmanuel Dunand/AFP Photo)

Segun Toriola of Nigeria plays a men's singles second round table tennis match against Koki Niwa of JapanMike Ehrmann/Getty Images

Brazil's Marina Gobbi Canetta prepares to shoot during an archery elimination round. Getty Images/Buda Mendes

Prepare for impact! Members of the South Korean defense brace for the ball as Sweden's Nathalie Hagman scores a penalty shot during the women's preliminary handball match on Aug. 8, 2016. Ben Curtis/AP Photo

Yosuke Nakayama, of Japan, sure shows it on his face! Mike Groll/AP Photo

Mathlynn Sasser of Marshall Islands reacts during the Women's 58kg Group B weightlifting. (Photo by Lars Baron/Getty Images)

Credit: EMMANUEL DUNAND/AFP/Getty

Joana Palacios of Argentina competes during the women's 63kg group B weightlifting contestJulian Finney/Getty Images/Yves Herman/Reuters

Matteo Aicardi of Italy plays water polo against FranceLaszlo Balogh/Reuters

Marcel Nguyen of Germany competes on the parallel bars during the men's gymnastics team finalMatthias Hangst/Getty Images

Chinese swimmer Sun Yang reacts after winning the 200m freestyle finalDominic Ebenbichler/Reuters

Brazilian rugby player Andre Nascimento tackles Kisi Keomaka Unufe of the USPhil Noble/Reuters

Neymar heads the ball during Brazil's first round Group A football matchEvaristo Sa/AFP

Manueli Tulo of Fiji competes in the men's 56kg weightlifting eventStoyan Nenov/Reuters

END11-AGOSTO-2016