Boxing is not pretty.
While speed, reactions, punching power, quickness and tactics are often the most important factors in determining the outcome of the sport, sometimes, it comes down to desire.
When a fighter, who may be lacking one skill or another is loaded with desire, he may do anything to win. That includes cheating and breaking the rules.
Boxing villains may be able to control themselves outside the ring, but when the bell rings, the neanderthal gene takes over and the fighter runs amok.
Sometimes, a fighter will use dirty and rough tactics on occasion, while other fighters may break the rules on a regular basis.
That makes them villains in the sports. Here's our ranking of the 10 greatest villains in boxing history.