Cus D'amato was one of the greatest trainers of all time. Ali even came to Cus for advise before he went into the ring with Foreman. The peek a boo style is was made Tyson great. His head movement and super fast hands from different angles is what made him so great. He might have beat Ali in his prime with Rooney, but theres no way futch could have trained him as good. Tyson mastered the style fit for Tyson