There's no dispute that a punch was landed but it was not a knockout punch-certainly not enough to make Liston roll over as if poleaxed.
In 42 fights after Liston, Ali had only 6 KO'S. In his 62 fights he had only one other first round KO (ROBINSON 1-2-0). Ali was not a puncher. The phantom punch was never seen again-either before or after Liston! Liston took a dive!