Great defence is all about balance, keeping your feet in the right place at the right time, concentrating on the distance from the opponent, keeping your hands up, never taking your eyes of an opponent, leaning, bending your knees, many many factors, even biting on your gumshield correctly is part of a good defence, it can be the difference between getting knocked out and staying awake.

Winky Wright is blessed with huge forearms, he really is like a damn crab, and stands so upright and just protects everything, he has developed this over many years, he's adapted his style to his attributes and all the greats learn to do that over time, the legends find a way to be strong in more than their initial strength departments, like Lennox for example was nothing like the strong defensive fighter he is now, but he developed his jab, so offense and defense just moulded, making him the best.