You brought up a point that I hadn't considered and it is a very valid one at that. I think that Tyson ran through so many of his opponents early on that he was never challenged enough to know what having heart really felt like. So when it came time to fight Buster Douglas who, at that time was both determined and emotionally charged, his managers were quick to assume that because Tysons record looked better on paper, he was going to beat Buster which would prep him for a fight with Holyfield. A sparring session he had while in Japan foreshadowed the feelings he would go through the day he lost to Douglas; when he was knocked down in the sparring session, he looked at his new trainer with eyes that seemed to say "what do I do" and his trainer simply told him to get up. The idea of losing was so foreign to him that when his sparring partner pushed back against his ego, he didn't know how to respond. Against Douglas, he faced the same problem/emotions and didn't know how to respond to Buster's attacks. His manager at the time of the Tyson vs Michael Johnson made an astute prediction without knowing it the night of that fight. He said that there was an "excellent problem" with Mike in that he was incredibly powerful and skilled fighter, so much so that he would knock his opponents out in the first round which looks impressive but doesn't give him the experience that he needs; it gives him a skewed outlook on how fights might go in the future while giving his ego an aura of invincibility. I love the Tyson that used to be, I wish he hadn't grown up the way he did, and I wish Cus D'Amato was still alive so he could train me!