Ali couldn't beat Tyson because Mike was a brawler/hard puncher. Lewis was a boxer. Mohammed would easily out box Lennox Lewis. Any heavyweight in the history of the sport couldn't out box Ali. Hence the name "The Greatest".
haha wtf are you talking about?
How the hell would Ali outbox Lewis when he is 2 inches shorter and 25-30lbs lighter?
Lewis was an incredible boxer and thats exactly why Ali wouldn't fair too well against him despite his superiour speed.
The way to beat Mike was either to box him (beat him from the outside) and at the same time break him down in the inside (see Holyfield fight) and Ali was the perfect speciment to do that.
Ali could take a punch and was a tough son of a bitch who fought to the end, hell in the Ken Norton fight he broke his jaw and still continued which is a testament to his resolve.
Mike on the other hand got frustrated when he couldn't knock out an opponent (tomato cans excluded).
One more thing.....Ali is the greatest not for the reason u stated above (which is ridiculous really).
He is the greatest because he beat everyone in 2 seperate decades which was the 60's and 70's, he defeated many hall of famers which are great in their own right.
Mike Tyson's resume dosent even compare to Ali's, Mike was all hype atleast to the general public who dont know boxing.
He was good for a few years but who did he beat?