Missed this one the other day, but Gamespot UK have posted a review of Knockout Kings 2002. They gave this a 8.3 out of 10. Here is part of the review:

Visually, Knockout Kings 2002 for the Xbox is a great-looking game. The first thing you might notice about the game's graphics is that the 3D modellers were very generous when creating the fighter models. Trinidad and the rest of the fighters in the lightweight and middleweight classes look extremely muscular - more so than in reality, but within reason. The faces of almost all the fighters look pretty much like their real-life counterparts. Their faces also realistically degrade after taking damage over a period of rounds and even contort when being struck, which is a neat effect - but it can really only be seen during the slow-motion replays. The real eye-catcher that makes Knockout Kings 2002 look great is the game's animation. The fighters move and throw punches quite realistically, although the animations when fighters get knocked down are a bit over-the-top. When you're knocked down, you'll see a neat visual effect of a blurry referee seen from your fighter's view. All the action during play can be seen quite well, since the default camera angle intelligently moves with the fighters during the bout. You can change the camera angle to a variety of views, including a first-person view that actually works fairly well. The only thing that looks a bit off is the collision detection, but only during replays. During play the collision detection looks spot-on, but when you watch a replay the punches don't always look like they are making realistic contact. To accentuate contact, you'll see sweat and occasionally even blood fly off the fighters as they are struck.