James Kirkland, Kovalev, David Haye (he glassed me!), Mike Tyson.
Kirkland - he's a psycho, a beast, will never stop fighting.
Kovalev - he's killed a man before, he won't have any sympathy.
Haye - we know he'll hit people with beer bottles
Tyson - even though he's in his 40s, you know he'll bite, headbutt and go ape shit if necessary.