Two UFC titles go on the line with hard-hitting, bone-crunching action from the Arco Arena in Sacramento, Calif. Georges St. Pierre faces welterweight champion Matt Hughes, the only fighter ever to beat him, and heavyweight champ Tim Sylvia defends his title against Jeff Monson. Other bouts from this 2006 event include Frank Mir vs. Brandon Vera, Nick Diaz vs. Gleison Tibau, Hector Ramirez vs. James Irvin and Josh Shockman vs. Jake O'Brien.