A judge watches as Kohei Uchimura of Japan falls off the pommel horse during the men's gymnastics team final.
Serbia's Uros Kovacevic (L) and Milan Rasic fall during their men's Group B volleyball match against Tunisia.
US goalkeeper Betsey Armstrong is hit by the ball during their women's preliminary round Group A water polo match against Spain.
Sam Oldham of Britain falls from the horizontal bar during the men's gymnastics team final.
Senegal's Pape Souare (R) falls next to UAE's Khamis Esmaeel during their men's Group A football match.
North Korea's Jong Sim Rim falls after failed attempt on the women's 69kg Group A weightlifting competition.
Russia's Kseniia Afanaseva falls during her floor exercise during the women's gymnastics team final.
South Korea's Choi Byungchul (top) falls down as he competes against Egypt's Alaaeldin Abouelkassem during their men's individual foil semifinal fencing match.
Georgia Bonora of Australia slips as she competes on the balance beam during the women's gymnastics qualification.
Japan's Daisuke Suzuki (13) falls on his goalkeeper Shuichi Gonda near Honduras' Antony Lozano in their men's Group D football match.
Thailand's Sirivimon Pramongkhol drops weights on the women 48kg Group A weightlifting competition.
Japan's Yoshiaki Oiwa falls from his horse Noonday de Conde while competing in the cross country equestrian event.
The Olympics is a theatre of dreams for competitors, but for some the dream has come crashing down, as this selection of images from Reuters photographers shows.
