The major problem is Tyson hit in combinations. Joe Louis's trainer Blackburn, told Joe to keep hitting on them even when they are falling and drive them to the ground. So I don't think Tyson would stop with just the right hand, but a left hook and / or uppercut would follow and its lights out for Mr. Ali.
That Changes to 3-4 free shots which becomes an entirely different story. 1 Shot would be tough especially when you know its coming. 3-4 might be different