2016 Rio Olympics - Athletics - Victory Ceremony - Men's 20km Race Walk Victory Ceremony - Olympic Stadium - Rio de Janeiro, Brazil - 12/08/2016. Zhen Wang (CHN) (Athletics) of China with the gold medal, Cai Zelin (CHN) of China with the silver medal and Dane Bird-Smith (AUS) of Australia with the bronze medal pose on podium. REUTERS/Alessandro Bianchi

2016 Rio Olympics - Tennis - Victory Ceremony - Men's Doubles Victory Ceremony - Olympic Tennis Centre - Rio de Janeiro, Brazil - 12/08/2016. Rafael Nadal (ESP) of Spain and Marc Lopez (ESP) of Spain pose with their gold medals. REUTERS/Toby Melville

2016 Rio Olympics - Tennis - Victory Ceremony - Men's Doubles Victory Ceremony - Olympic Tennis Centre - Rio de Janeiro, Brazil - 12/08/2016. Rafael Nadal (ESP) of Spain and Marc Lopez (ESP) of Spain pose with their gold medals. REUTERS/Kevin Lamarque

2016 Rio Olympics - Tennis - Victory Ceremony - Men's Doubles Victory Ceremony - Olympic Tennis Centre - Rio de Janeiro, Brazil - 12/08/2016. Gold medalists Rafael Nadal (ESP) of Spain and Marc Lopez (ESP) of Spain, silver medalists Florin Mergea (ROU) of Romania and Horia Tecau (ROU) of Romania, and bronze medalists Steve Johnson (USA) of USA and Jack Sock (USA) of USA pose with their medals. REUTERS/Kevin Lamarque

2016 Rio Olympics - Tennis - Victory Ceremony - Men's Doubles Victory Ceremony - Olympic Tennis Centre - Rio de Janeiro, Brazil - 12/08/2016. Steve Johnson (USA) of USA and Jack Sock (USA) of USA react after receiving their bronze medals. REUTERS/Kevin Lamarque FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS.

2016 Rio Olympics - Tennis - Final - Men's Doubles Gold Medal Match - Olympic Tennis Centre - Rio de Janeiro, Brazil - 12/08/2016. Silver medalists Florin Mergea (ROU) of Romania and Horia Tecau (ROU) of Romania pose with their medals. REUTERS/Kevin Lamarque

2016 Rio Olympics - Tennis - Victory Ceremony - Men's Doubles Victory Ceremony - Olympic Tennis Centre - Rio de Janeiro, Brazil - 12/08/2016. Gold medalists Rafael Nadal (ESP) of Spain and Marc Lopez (ESP) of Spain, silver medalists Florin Mergea (ROU) of Romania and Horia Tecau (ROU) of Romania, and bronze medalists Steve Johnson (USA) of USA and Jack Sock (USA) of USA pose with their medals. REUTERS/Toby Melville

2016 Rio Olympics - Tennis - Final - Men's Doubles Gold Medal Match - Olympic Tennis Centre - Rio de Janeiro, Brazil - 12/08/2016. Rafael Nadal (ESP) of Spain and Marc Lopez (ESP) of Spain celebrate after winning their match against Florin Mergea (ROU) of Romania and Horia Tecau (ROU) of Romania. REUTERS/Toby Melville