All depends what type of fight Foreman fights. If he fought like he did against Ali, Tyson would have broken him down and out within 5 rounds. If Foreman was accurate with his punches and didn't forget his defence, then i'd say he had a good chance of ko'ing Tyson. Foreman fought a terrible fight against Ali,that is why he lost. He showed Ali no respect, had no accuracy with his punches and forgot his defence altogether. Look at Foreman's other fights, he fought terrible against Ali. And no it wasn't because Ali made him look bad. George made himself look bad. He had that fight but he shot himself in the foot.