Fireworks explode during the opening ceremony REUTERS/Pawel Kopczynski
Giorgio Avola of Italy celebrates winning his foil match. REUTERS/Issei Kato
Ruta Meilutyte of Lithuania competes in the Women's 100m Breaststroke. REUTERS/Michael Dalder
Rugby player Isadora Cerullo of Brazil kisses Marjorie, a volunteer, after receiving her wedding proposal on the sidelines of the women's rugby medal ceremony. REUTERS/Alessandro Bianchi
Doaa Elghobashy of Egypt and Kira Walkenhorst of Germany compete int he preliminary beach volleyball event. REUTERS/Lucy Nicholson
Usain Bolt dances samba at a press conference. REUTERS/Nacho Doce
Samir Ait Said of France holds his broken leg that was left dangling from below his knee following a crash landing from the vault and had to be taken out of the arena on a stretcher on a dangerous day in the gymnastics competition. REUTERS/Athit Perawongmetha
Emma McKeon Brittany Elmslie Bronte Campbell and Cate Campbell of Australia celebrate the Women's 4 x 100m Freestyle Relay Final. REUTERS/Stefan Wermuth
Mathlynn Sasser of Marshall Islands celebrates during women's 58kg weightlifting. REUTERS/Yves Herman
Performers take part in the Opening Ceremony. REUTERS/Lucy Nicholson
Michael Phelps of the U.S. celebrates as his 4 x 100m freestyle relay won the gold. REUTERS/Stefan Wermuth
A performer takes part in the opening ceremony. REUTERS/Stefan Wermuth
Novak Djokovic of Serbia reacts after losing his match against Juan Martin Del Potro (ARG) of Argentina. REUTERS/Toby Melville
Coach Takahiro Moriizumi of Japan celebrates with the team's gold medals. REUTERS/Dylan Martinez
Kei Nishikori of Japan is reflected in a window as he serves against Albert Ramos of Spain during Men's Singles First Round tennis. REUTERS/Toby Melville
The Refugee Olympic Athletes' team arrives for the opening ceremony. REUTERS/Kai Pfaffenbach
Michael Phelps, Ryan Held, Caeleb Dressel and Nathan Adrian of the U.S. celebrate on the podium for the 4 x 100m freestyle relay. REUTERS/David Gray
Kohei Uchimura of Japan falls as he competes on the horizontal bar. REUTERS/Dylan Martinez
Lithuania's Danas Rapsys takes a selfie in a practice in Rio de Janeiro. REUTERS/Edgard Garrido
Rafaela Silva of Brazil celebrates after winning gold in the 57kg women's judo. REUTERS/Kai Pfaffenbach