That's actually being disrespectful to both fighters. That was a brutal, gruelling fight and if either one of them didn't try their hardest then somebody would have got seriously hurt. I have no doubt that Tszyu could have physically continued a bit longer but he had been worn down by a stronger opponent who he had hit with huge shots which didn't deter him. He was psychologically broken as well as physically battered. You could argue that Ricky got away with stuff, but Tszyu most certainly did give it his all.