The matchup between Nick Diaz and B.J. Penn will be crucial in determining the next challenger for Georges St. Pierre.
That determination, of course, is not only about wins, losses and how dominant a fight might be. It also has to do with how the fighter handles all aspects of being a UFC fighter, yes Diaz, you still need to prove yourself to be a reliable asset to the UFC family.
Looking to the fight at UFC 137, there are a few aspects to take a look at when it comes to matching up the former two-division UFC champion and the former Strikeforce champion.