Kahn vs Alexander or Bradley

Dan raf is trying to put Kahn in the same sentence as these guys obviously insinuating he could hang with them. My uncle pointed out to me that paulie had success with the check hook in the middle rounds against kahn, when kahn was coming in. Alexander could do the same with much more power and conviction. Bradley is a different story because he is not as tall as alexander so that fight is a little more tough to call. Then i watched this video again And around 30 seconds, correct me if im wrong, does Kahn's leg buckle from that stiff jab from prescott? If this is true i have a hard time beleiving he could take that over hand right from bradley. I mean i really think kahn could slip it, or beat him to the punch, but could he do this for 12 rounds? your thoughts on either fight?