Without a doubt Money is one of the toughest (if not the toughest) to ever lace them up. Anyone who thinks or says otherwise DKSAB.
Margin Hagler was stupid tough for sure but, I'm gonna get panned for saying this but what Nigel Benn endured against The G Man was one of the greatest displays of toughness I remember seeing. He was an absolute mess after the fight and we all know what happened to McClellan. Yeah he bottled it against Steve Collins but he was shot to **** and lost all desire for the game by then. James Toney, Mike Mccallum, Carl Thompson, Joe Frazier. A lot of these guys got floored numerous times ( Frazier 5 times in 1 round against Foreman) but Jesus, they still kept getting up!
Ali was the toughest fighter I ever saw. He beat guys like Lyle, Shavers and Norton when he was completely old and shot and suffering from Parkinsons and kidney disease.