agREED. Some folks like to make it seem like it was a lucky punch from Tzysu, but that wasn't the case.
In a rematch, Zab would have still moved straight back against one of the deadliest straight punchers in the game. Hell, he was still getting caught by the same punch by slow ass Baldomir a few years later. Some people are just too dumb to learn from their mistakes, Zab is one of them.
Don't forget about Sharmba Mitchell only losing to Tszyu because he had two broken legs and was bitten in the face by a scorpion. Unfortunately there was never a rematch.