- Welterweight champ Georges St. Pierre vs. lightweight champ B.J. Penn for the welterweight belt: A classic matchup of two champs in their prime. GSP has the advantage in cardio, but if he's rocked early, he will need to prove his improved mental game is strong enough to weather an onslaught. Penn, perhaps the most flexible fighter in the UFC, will need to demonstrate he has enough in his gas tank to keep up with GSP. Regardless of the outcome, this should be a fight for the ages.
PREDICTION: GSP by fourth-round stoppage.
- Lyoto Machida vs. Thiago Silva: It's the battle of the undefeated Brazilians. Machida has been labelled boring for his stick-and-run approach. The karate master -- sporting a 13-0 record -- may have a tough time outrunning slugger Silva, who has an identical record. But if Machida's successful in ducking Silva's punches, he will get the judges' nod.
PREDICTION: Machida by decision.
- Stephan Bonnar vs. Jon Jones: Jones has a perfect 7-0 record entering his second UFC fight. But he hasn't faced a fighter with as big a scoresheet. Bonnar, who has beaten Keith Jardine and gone the distance with former champ Forrest Griffin, should walk away from this fight with his arm raised. His training at Xtreme Couture in Las Vegas should show.
PREDICTION: Bonnar by second-round submission.
- Karo Parisyan vs. Dong Hyun Kim: Parisyan's resume is filled with the who's who in his weight class. The judo master has fought GSP, Thiago Alves, Matt Serra and Nick Diaz. Coming off a flying knee loss to Alves, Parisyan will be hungry to spark a win streak. Known for his failure to finish, he doesn't want to let this one go to a decision.
PREDICTION: Parisyan by second-round TKO.
- Nate Diaz vs. Clay Guida: This could be the Fight of the Night between exciting lightweights who can throw down, wrestle and not run out of gas. Diaz likes the submission game and so does Guida. Look for a clinic on ground work.
PREDICTION: Diaz by decision.