Dude it wasn't even his chin I don't think so much as an utter lack of heart, of spirit, of drive ya know... Seemed to me like he just gave up.... Watched the fight it was interesting... but mostly I thought Klitschko just lacks heart... The dude that beat him has nothing, outta shape, crap speed, no legs... Over all I thought they both should have been sent home.
But yeah, Klitschko definitely packed it in... Definitely missing the grunt required to continue in the sport... He is done!!!