UFC 137 Main card:
Welterweight Championship: Georges St.Pierre vs. Carlos Condit
Welterweight bout: BJ Penn vs. Nick Diaz
Heavyweight bout: Cheick Kongo vs. Matt Mitrione
Heavyweight bout: Mirko Filipović vs. Roy Nelson
Featherweight bout: Hatsu Hioki vs. George Roop
Okay, with all due respect to Condit, GSP is going to FINISH this fight. Condit happens to be a great fighter, well-rounded fighter. Great KO power, good submissions and overall movement. However, two things will decide this fight. GSP's incredible cardio and take downs, if Condit didn't work on his take down defense, then it's all over.
Now, to the more exciting fight. Diaz has been great in Strikeforce for the past 2-3 years. KO and boxing is second to none, his jiu jitsu techniques are incredible, of course, a Gracie product. However, he shouldn't expect the level of strikeforce fighters here, UFC fighters take the tactical approach of fights very seriously and BJ Penn is one very experienced fighter. This is going to be a very close fight with expected fireworks before and after the fight. I'd say either a decision win for BJ Penn or KO win for Diaz. IMO. It'll never end in a submission, simply because the level of jiu jitsu both posses is just world-class. Definitely 'Fight of the Night'.
Finally, I have both Mitrione and Cro Cop beating Kongo and Big Country by KO.