I am gonna go out on a limb here and say GSP stops Diaz. I don't think we have seen GSP have a genuine "issue" with his opponent before this. He is gonna come out to end Diaz and I think he will. Personally, I hope he does as well. Now, if Greg Jackson happens and GSP still wins the fight Nick will never let GSP hear the end of not finishing him regardless if it is a dominant UD.