Olympic boxing is governed by a special set of rules.Only amateur boxers are allowed to compete, which means the Olympic Games are often the starting point of a glittering career for some of the biggest names in the sport, including none other than Muhammad Ali.Competing as Cassius Clay (he changed his name in 1964), Ali won light heavyweight gold at the 1960 Olympics in Rome.After the bout ends, each judge adds up the round scores to determine a final winner.