Zab will go down in boxing history as one of the greatest wasted talents ever. He has not been the same since Tszyu rocked his world in 2001. He had one good win against Spinks and that's it since then, he is capable of anything and Cotto knows this, Mayweather is a better fighter than Zab and that must be conceded. This is Zab's last chance and like a wounded lion i expect him to perform knowing that it really is his last chance. He loses this fight and he won't get another shot for years or ever.
You need more than natural talent to win big fights sometimes and i wonder if Zab has anything other than that going for him.