Khan even took big shots flush for 2 rounds off Garcia.. Its was the timing, power, placement(behind ear neck) that messed Khan up. Khan at 147 will be stronger all round.
If a fighter gets knocked out - glass chin If a fighter gets knocked down - glass chin If a fighter is hurt - glass chin If a fighter is never hurt or knocked down - hiding a glass chin Virtually every fighter that ever existed qualifies for a glass jaw. Hagler? Wobbled once from a punch, glass jaw. Muhammad Ali? Knocked down by a cruiserweight, glass jaw. Robinson? Knocked down by Lamotta, glass jaw. Don't even get me started on the likes of Pacquaio, Duran etc.
it all depends. if ur getting knocked down from kovalev... or danny garcia left hook.. or lucas mattyhsse then kno u dont have a glass chin those guys hit hard as ever. if ur on the mat over and over again in multiple fights like khan then yes u have a glass chin. or everytime ur even touched ur get wobbled like or khan or seth mitchell those are glass chins.. but if provo knocks ur down ur str8... there guys with glass chins and lost of heart like khan thats why i respect khan. i kno one thing a guy like tim bradley i dont kno bout his chin. pacman doesnt knock him down but provo and kendall holt put him twice in one fight just weird.. and i kno provo and holt hit super hard .. but doesnt pac as well and throw a lot more punches/combos