2016 Rio Olympics - Judo - Victory Ceremony - Women -52 kg Victory Ceremony - Carioca Arena 2 - Rio de Janeiro, Brazil - 07/08/2016. Majlinda Kelmendi (KOS) of Kosovo reacts. REUTERS/Toru Hanai

2016 Rio Olympics - Tennis - Preliminary - Women's Doubles First Round - Olympic Tennis Centre - Rio de Janeiro, Brazil - 07/08/2016. Lucie Safarova (CZE) of Czech Republic and Barbora Strycova (CZE) of Czech Republic celebrate after winning their match against Serena Williams (USA) of USA and Venus Williams (USA) of USA. REUTERS/Toby Melville

2016 Rio Olympics - Tennis - Preliminary - Women's Doubles First Round - Olympic Tennis Centre - Rio de Janeiro, Brazil - 07/08/2016. Serena Williams (USA) of USA and Venus Williams (USA) of USA leave after losing their match against Lucie Safarova (CZE) of Czech Republic and Barbora Strycova (CZE) of Czech Republic. REUTERS/Toby Melville

2016 Rio Olympics - Fencing - Final - Men's Foil Individual Gold Medal Bout - Carioca Arena 3 - Rio de Janeiro, Brazil - 07/08/2016. Daniele Garozzo (ITA) of Italy celebrates winning his match. REUTERS/Issei Kato

2016 Rio Olympics - Fencing - Victory Ceremony - Men's Foil Individual Victory Ceremony - Carioca Arena 3 - Rio de Janeiro, Brazil - 07/08/2016. Daniele Garozzo (ITA) of Italy (C) celebrates winning the gold medal. REUTERS/Issei Kato

2016 Rio Olympics - Beach Volleyball - Men's Preliminary - Beach Volleyball Arena - Rio de Janeiro, Brazil - 07/08/2016. Sergio Gonzalez (CUB) of Cuba reacts. REUTERS/Ruben Sprich

2016 Rio Olympics - Beach Volleyball - Men's Preliminary - Beach Volleyball Arena - Rio de Janeiro, Brazil - 07/08/2016. Pedro (BRA) of Brazil and Sergio Gonzalez (CUB) of Cuba compete. REUTERS/Lucy Nicholson

2016 Rio Olympics - Volleyball - Men's Preliminary - Pool A USA v Canada - Maracanazinho - Rio de Janeiro, Brazil - 07/08/2016. (L-R) Aaron Russell (USA) of USA spikes the ball against Steven Marshall (CAN) of Canada, Graham Vigrass (CAN) of Canada and John Perrin (CAN) of Canada. REUTERS/Marcelo del Pozo