This game is widely acclaimed as one of the if not THE greatest Boxing Game ever made for the Personal Computer. It featured motion captured graphics albeit the boxers were, well, boxes. In between bouts, you can train your player in improving speed, power or stamina. The game also feature quite advanced 3D capability for its time, such as multiple camera angles, and smooth realistic player movement.
Definitely worth a try even on modern machines, as you might find this game still more enjoyable than any of its modern descendants.