2016 Rio Olympics - Athletics - Preliminary - Women's 5000m Round 1 - Olympic Stadium - Rio de Janeiro, Brazil - 16/08/2016.Empty seats are pictured during the athletics events. REUTERS/Dylan Martinez

2016 Rio Olympics - Athletics - Preliminary - Men's 200m Round 1 - Olympic Stadium - Rio de Janeiro, Brazil - 16/08/2016. Empty seats REUTERS/Dylan Martinez

Rio 2016 Olympics communicatons director Mario Andrada gives a news conference about reports that a bullet tore through the media tent at the Deodoro Olympic Equestrian Center, in Rio de Janeiro, Brazil, August 6, 2016. REUTERS/Tony Gentile

2016 Rio Olympics - Tennis - Final - Men's Singles Gold Medal Match - Olympic Tennis Centre - Rio de Janeiro, Brazil - 14/08/2016. Juan Martin Del Potro (ARG) of Argentina in action against Andy Murray (GBR) of Britain. REUTERS/Kevin Lamarque

2016 Rio Olympics - Tennis - Final - Men's Singles Gold Medal Match - Olympic Tennis Centre - Rio de Janeiro, Brazil - 14/08/2016. Juan Martin Del Potro (ARG) of Argentina reacts during match against Andy Murray (GBR) of Britain. REUTERS/Toby Melville

Joao Havelange, the President of FIFA, the world governing body of soccer, speaks at the organisation's 51st congress in Paris June 7, 1998. REUTERS/Ian Waldie/File photo - RTX2L6K6

2016 Rio Olympics - Athletics - Preliminary - Men's 200m Round 1 - Olympic Stadium - Rio de Janeiro, Brazil - 16/08/2016. Kyle Greaux (TTO) of Trinidad and Tobago, Jaysuma Saidy Ndure (NOR) of Norway, Usain Bolt (JAM) of Jamaica, Jonathan Borlee (BEL) of Belgium and Solomon Bockarie (NED) of Netherlands compete. REUTERS/David Gray FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS.

Congolese civilians queue at a soccer pitch to be vaccinated during an emergency campaign of vaccination against yellow fever in Kisenso district, of the Democratic Republic of Congo's capital Kinshasa, July 20, 2016. REUTERS/Kenny Katombe/Files