Nick Diaz and BJ Penn are set to face off in the main event at UFC 137. The fight will take place Saturday, October 29 from the Mandalay Bay Events Center in Las Vegas, NV.

Inside MMA recently sat down with Diaz’s trainer, Cesar Gracie to discuss the Penn fight. Hosts Bas Rutten and Kenny Rice also spoke to Gracie about Diaz’s mindset heading into the fight as well as Nick being pulled from his originally scheduled bout against Georges St. Pierre.

Further Reading: Cesar Gracie: If Nick Diaz wins, we'll ask for GSP