The countering is overplayed. Contrary to what people think, Lennox himself doesn't believe his chin is an issue. Lennox was tagged with heavy shots much more than people realize. But there is no question that Lennox should have stepped on the gas in some of his fights, most notably both Evander fights. Mavrovic, Mercer, Tua and a few others are outliers as they were fighters with granite chins that for the most part, were avoided by everyone else. There is a reason Evander and Tyson never fought Tua for example.
Fair enough, I was just going over some of the times Lewis' ate big shots and didnt go down, theres no doubt he has heart and is very strong mentally. I like Tua, but the man is overrated, Rahman gave him two tough fights, the first ending in controversy, the other a draw. Tua also got killed against Bryd, who made him look almost as bad as Lewis did. Holyfield in his prime would box circles around him, and Tyson would probably end up knocking him out in the late rounds, but there is a chance Tua lands something big and takes iron mike out.