Ferry Weertman of the Netherlands won the men's marathon swimming event off Rio's Copacabana Beach on Tuesday in a race so close that he did not realise he had won until a friend called from home to give him the good news.
A group of athletes in Rio has found the secret to enhanced performance and it has nothing to do with doping.
Check out the gold medallists on Day 11 of the 2016 Olympic Games in Rio de Janeiro on Tuesday.