5. Liddell-Silva (UFC 79)
At the time that this match happened, Wanderlei Silva had just crossed over to the UFC from PRIDE. Before that, though, these to fighters had had their eyes on a matchup. When it came, they did not disappoint, and after three rounds of fighting Chuck Liddell earned the decision.
6. Hughes-Penn II (UFC 63)
After losing the first time around, Matt Hughes was eager to get a rematch with the energetic B. J. Penn. When that rematch came around, though, it looked like Penn was going to run away with it again. But, he overcommitted himself, tiring in the third round and opening the door to a decisive win by Hughes.