An agent of the bomb squad in protective clothing stands in the area near the finishing line of the men's cycling road race at the 2016 Rio Olympics after they made a controlled explosion, in Copacabana, Rio de Janeiro, Brazil August 6, 2016. REUTERS/Paul Hanna

An agent of the bomb squad in protective clothing stands in the area near the finishing line of the men's cycling road race at the 2016 Rio Olympics after they made a controlled explosion, in Copacabana, Rio de Janeiro, Brazil August 6, 2016. REUTERS/Paul Hanna

2016 Rio Olympics - Tennis - Olympic Tennis Centre - Rio de Janeiro, Brazil - 06/08/2016. People wait in line for beer. REUTERS/Kevin Lamarque

2016 Rio Olympics - Beach Volleyball - Women's Preliminary - Beach Volleyball Arena - Rio de Janeiro, Brazil - 06/08/2016. Isabelle Forrer (SUI) of Switzerland and Anouk Verge-Depre (SUI) of Switzerland during the game. REUTERS/Ruben Sprich

2016 Rio Olympics - Beach Volleyball - Women's Preliminary - Beach Volleyball Arena - Rio de Janeiro, Brazil - 06/08/2016. April Ross (USA) of USA and Kerri Walsh (USA) of USA react. REUTERS/Ruben Sprich

2016 Rio Olympics - Beach Volleyball - Women's Preliminary - Beach Volleyball Arena - Rio de Janeiro, Brazil - 06/08/2016. Yue Yuan (CHN) of China (PRC) and Wang Fan (CHN) of China (PRC) react. REUTERS/Ruben Sprich

2016 Rio Olympics - Beach Volleyball - Women's Preliminary - Beach Volleyball Arena - Rio de Janeiro, Brazil - 06/08/2016. Mariafe Artacho (AUS) of Australia in action. REUTERS/Ruben Sprich

2016 Rio Olympics - Tennis - Preliminary - Women's Singles First Round - Olympic Tennis Centre - Rio de Janeiro, Brazil - 06/08/2016. Ana Ivanovic (SRB) of Serbia in action against Carla Suarez Navarro (ESP) of Spain. REUTERS/Toby Melville