No, I am talking about just plain old fashioned cheating. Which in the world of professional boxing is things like low blows, head butting, hitting the back of your opponent's head, kidney punches, rabbit punches, etc.
The fight in the YouTube video further below - Riddick Bowe Vs Andrew Golota - is a rematch between two boxers who hate each other. The first of the two fights can also be seen on YouTube, but it is their 2nd fight which is the more interesting of the two fights.
The two boxers are evenly matched, but their primary difference is that Golota likes using headbutts and low blows - which gives him an unfair advantage over a fighter who doesn't cheat.
So who will get the upper hand during the fight? Who will win? Watch and see. When you see the match you will understand why this is such an important match and why it is a great demonstration of both boxing skill and the difference between good sportsmanship / cheating.
(Personal Note - This is my all time favourite boxing match to watch. I love watching this match. Even people who are not normally into boxing will appreciate watching this match.)