Mate if Ruiz can KO AJ then Fury can
If he punches himself out like he did against Ruiz, I agree. But as I said, he's more disciplined now.
There's nothing wrong with Joshua's chin, he's taken some big shots from much bigger punchers than Fury. Every time he's been in trouble in a fight it's been because he's got someone hurt and gone after the finish, then gassed.