How have I not seen this before?! (David Haye)

I cannot believe I hadn't seen or heard of this before: So fucking funny. I knew Klitschhko and Haye talked and Klitschko said he spoke alot and was "mad" but I just assumed they'd met to discuss the fight in some boardroom or something, I never knew Haye chased him down at a Charity Media function, hahaha. Some say Haye is over-rated, I think he's awesome and charismatic. We need more like him in the Heavyweight, it's pretty cool that he's moving up. Also, if you look on the side you can see a Mike Tyson interview and in that Haye is mentioned by the interviewer and about how Haye is aiming to move up to Heavyweight and Tyson responds that he's never heard of him. Now from all accounts that I know, Tyson still remains up to date on boxing and hasn't chucked in the sport. He hates the people in the sport, excluding the fighters, but does love the actual sport. So how on Earth does Tyson not know of Haye? Reckon Tyson just doesn't like him for being quite cocky and loud and just doesn't want to feed into it or do you reckon Tyson genuinely doesn't know who he is and the only reason I know of him so well is because Haye is British (and so am I)...Basically, is Haye aswell known internationally?