They would both be bigger upsets then Serra beating GSP. At that time it was thought that Serra was better at one aspect of mma then GSP, can you guys say the same thing about Tim OR Sherk? I think that Fedor is the greatest but Tim CAN knock him out if he connects, I don't think Sherk has enough power to KO Penn even if he connects cleaner then he ever has in a fight. Bigger upset would be Sherk
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