Rio Olympics - Rio de Janeiro, Brazil - 10/08/2016. Rio 2016 spokesman Mario Andrada (L) and Rio 2016 security director Luiz Fernando Correa speak at a press conference. REUTERS/Kevin Coombs

A television cameraman films two holes in the tent that serves as a media center for the Deodoro Olympic Equestrian Center during the first day of competition of the Rio 2016 Olympic Games, in Rio de Janeiro, Brazil, August 6, 2016. REUTERS/Tony Gentile

A television cameraman films two holes in the tent that serves as a media center for the Deodoro Olympic Equestrian Center during the first day of competition of the Rio 2016 Olympic Games, in Rio de Janeiro, Brazil, August 6, 2016. REUTERS/Tony Gentile

Michael Phelps of the U.S. poses with his gold medal after winning the men's 4x100m medley relay final during the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Jorge Silva/File photo

Michael Phelps of the US is seen with a red cupping mark on his shoulder as he competes in the Men's 4 x 100m Freestyle Relay Final at the 2016 Rio Olympics in Rio de Janeiro, Brazil August 7, 2016. . REUTERS/Dominic Ebenbichler/File Photo

2016 Rio Olympics - Judo - Preliminary - Men -90 kg Elimination Rounds - Carioca Arena 2 - Rio de Janeiro, Brazil - 10/08/2016. Gwak Dong Han (KOR) of South Korea and Popole Misenga (ROT) of Refugee Olympic Athletes compete. REUTERS/Toru Hanai

Rio Olympics - Swimming - Preliminary - Women's 200m Breaststroke - Heats - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 10/08/2016. Yulia Efimova (RUS) of Russia competes. REUTERS/Dominic Ebenbichler

2016 Rio Olympics - Rugby - Preliminary - Men's Pool A Fiji v USA - Deodoro Stadium - Rio de Janeiro, Brazil - 10/08/2016. Garrett Bender (USA) of USA reacts after their loss to Fiji. REUTERS/Phil Noble