2016 Rio Olympics - Swimming - Final - Men's 1500m Freestyle Final - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 13/08/2016. Gregorio Paltrinieri (ITA) of Italy (L) is congratulated by Gabriele Detti (ITA) of Italy after winning. REUTERS/Marcos Brindicci

2016 Rio Olympics - Swimming - Final - Women's 50m Freestyle Final - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 13/08/2016. Pernille Blume (DEN) of Denmark reacts after winning. REUTERS/Marcos Brindicci

2016 Rio Olympics - Swimming - Victory Ceremony - Women's 4 x 100m Medley Relay Victory Ceremony - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 13/08/2016. Gold medallists from USA, silver medallists from Australia and bronze medallists from Denmark pose with their medals. REUTERS/Dominic Ebenbichler

2016 Rio Olympics - Swimming - Final - Men's 4 x 100m Medley Relay Final - Olympic Aquatics Stadium - Rio de Janeiro, Brazil - 13/08/2016. Michael Phelps (USA) of USA reacts. REUTERS/Dominic Ebenbichler

2016 Rio Olympics - Athletics - Final - Women's 100m Final - Olympic Stadium - Rio de Janeiro, Brazil - 13/08/2016. - Elaine Thompson (JAM) of Jamaica celebrates her gold medal in the women's 100 meters by taking a victory lap. REUTERS/Murad Sezer

2016 Rio Olympics - Athletics - Final - Women's 100m Final - Olympic Stadium - Rio de Janeiro, Brazil - 13/08/2016. Elaine Thompson (JAM) of Jamaica (R) and Shelly-Ann Fraser-Pryce (JAM) of Jamaica hold up their national flag after winning gold and bronze respectively in the women's 100m final. REUTERS/Lucy Nicholson

2016 Rio Olympics - Athletics - Victory Ceremony - Men's 10,000m Victory Ceremony - Olympic Stadium - Rio de Janeiro, Brazil - 13/08/2016. Mo Farah (GBR) of Britain celebrates on podium. REUTERS/Alessandro Bianchi

2016 Rio Olympics - Athletics - Final - Men's 10,000m Final - Olympic Stadium - Rio de Janeiro, Brazil - 13/08/2016. Mo Farah (GBR) of Britain celebrates winning the men's 10,000m final. REUTERS/Alessandro Bianchi