Chuck Liddell goes back into the ring for a rematch against UFC Light Heavyweight champ Randy Couture, who smoked him two years earlier in their first fight. Meanwhile, the undercard match features a battle for the UFC Welterweight Championship. Reigning champ Matt Hughes and his nemesis, Frank Trigg, face off. Appearances from other fighters include Georges St. Pierre, Matt Lindland, Ivan Salaverry, Joe Riggs and Renato "Babalu" Sobral.