he can't take a bad one, remember willie limond, a known none puncher coming up a weight put khan in all sorts of trouble, poor old frank went white as a sheet that night. fair play to khan, he's plugged away and got a version of a world title, and done a number on salitas who was the mandatory challenger. who he fights, i would say is largely out of his hands, his management/promoters sort that out, and i think their well aware of the problems he has regards punch resistance, hence why he's not fighting marcos maidana, who roach said he'd rather vacate the belt than fight at this moment.
i.m