Originally Posted by PowerPuncher
Ali's fundamentals are generally sound aside from leaning back with his hands down. That's the main error he makes, although few could punish him for it, especially in his prime. Also he'd punch while on his tip toes - which makes you harder to hit but gives up power.
But perhaps more than anyone I've ever seen (especially HWs) he had the ability to get set and plant his feet in the middle of a movement and deliver a hard blow. Like the rights he felled Williams and Mildenberger with.