2016 Rio Olympics - Boxing - Final - Men's Light Heavy (81kg) Final Bout 257 - Riocentro - Pavilion 6 - Rio de Janeiro, Brazil - 18/08/2016. Julio Cesar La Cruz (CUB) of Cuba and Adilbek Niyazymbetov (KAZ) of Kazakhstan compete. REUTERS/Peter Cziborra

Security video shows three U.S. Olympic swimmers returning to their taxi at a gasoline station where they were accused by staff of having caused damage, in Rio de Janeiro, August 14, 2016. Courtesy Globo TV/Handout via Reuters

2016 Rio Olympics - Golf - Final - Men's Individual Stroke Play - Olympic Golf Course - Rio de Janeiro, Brazil - 14/08/2016. Thomas Pieters (BEL) of Belgium hits a tee shot on the third hole during the final round of the men's Olympic golf compeititon. REUTERS/Andrew Boyers

2016 Rio Olympics - Volleyball - Women's Semifinals Serbia v USA - Maracanazinho - Rio de Janeiro, Brazil - 18/08/2016. Brankica Mihajlovic (SRB) of Serbia celebrates a point with team mates. REUTERS/Ricardo Moraes

2016 Rio Olympics - Volleyball - Women's Semifinals Serbia v USA - Maracanazinho - Rio de Janeiro, Brazil - 18/08/2016. Milena Rasic (SRB) of Serbia, Brankica Mihajlovic (SRB) of Serbia and Maja Ognjenovic (SRB) of Serbia celebrate a point. REUTERS/Ricardo Moraes

2016 Rio Olympics - Volleyball - Women's Semifinals Serbia v USA - Maracanazinho - Rio de Janeiro, Brazil - 18/08/2016. Brankica Mihajlovic (SRB) of Serbia spikes the ball against Alisha Glass (USA) of USA and Foluke Akinradewo (USA) of USA. REUTERS/Ricardo Moraes

2016 Rio Olympics - Volleyball - Women's Semifinals Serbia v USA - Maracanazinho - Rio de Janeiro, Brazil - 18/08/2016. Brankica Mihajlovic (SRB) of Serbia (R) gestures as her team mates look on. REUTERS/Ricardo Moraes

2016 Rio Olympics - Volleyball - Women's Semifinals Serbia v USA - Maracanazinho - Rio de Janeiro, Brazil - 18/08/2016. Brankica Mihajlovic (SRB) of Serbia reacts. REUTERS/Yves Herman