Judah moved up to fight the Undisputed Champ in Spinks, who like Collazo is a southpaw who has good boxing skills but they say lacks power but had pop to move people. Judah fought a very close fight the first time and Spinks got the decision, but once Zab settled into the weight he came back and stopped Spinks. I see no reason why Hatton shouldn't be able to do the same against Collazo if they have a rematch.