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The biggest sports weekend of the year gets even bigger with UFC 109: RELENTLESS. In the main event, it's the clash of legends UFC fans have waited ten years for when Hall of Famers Randy "The Natural" Couture and Mark "The Hammer" Coleman finally square off in a battle for the ages. The UFC's top two middleweight contenders, Nate Marquardt and Chael Sonnen, collide in a bout that will move the winner one step closer to a world title shot. Plus, two of the game's 170-pound superstars, former champion Matt Serra and two-time title challenger Frank Trigg, meet for the first time in a pivotal matchup. UFC 109: Relentless, Saturday, February 6, live on pay-per-view from the Mandalay Bay Events Center, in Las Vegas, Nevada.