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/Marcos Brindicci

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

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

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/Marcos Brindicci

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

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/Kevin Lamarque

2016 Rio Olympics - Sailing - Final - Women's Windsurfer - RS:X - Medal Race - Marina de Gloria - Rio de Janeiro, Brazil - 14/08/2016. Charline Picon (FRA) of France celebrates gold medal. REUTERS/Brian Snyder

2016 Rio Olympics - Golf - Final - Men's Individual Stroke Play - Olympic Golf Course - Rio de Janeiro, Brazil - 14/08/2016. Matt Kuchar (USA) of the United States looks at his bronze medal in the men's Olympic golf compeititon. REUTERS/Andrew Boyers