If I could choose any two fighters in history to go against each other this would be the fight, as far as pure physical talent Mike Tyson would come in with the advantage, as far as tactics and ring generalship Ali would have the advantages, the fight would be very similiar to the first Liston fight but Mike would be able to put on a little more pressure and do more damage to Ali, but I see Ali moving all night and not letting Mike establish a rhythm of trading punches, Ali in a UD but he would not talk about being pretty after the fight.