UFC 109: Relentless is an upcoming mixed martial arts event to be held by the Ultimate Fighting Championship (UFC) on February 6, 2010 at the Mandalay Bay Events Center in Las Vegas, Nevada.
Official Fight Card
Main Card
* Light Heavyweight bout: United States Randy Couture vs. United States Mark Coleman
* Middleweight bout: United States Nate Marquardt vs. United States Chael Sonnen
* Welterweight bout: United States Mike Swick vs. Brazil Paulo Thiago
* Middleweight bout: Brazil Demian Maia vs. United States Dan Miller
* Welterweight bout: United States Matt Serra vs. United States Frank Trigg
Spike TV Card
* Lightweight bout: United States Mac Danzig vs. United States Justin Buchholz
* Lightweight bout: United States Melvin Guillard vs. Brazil Ronnys Torres
Preliminary Card
* Lightweight bout: United States Phillipe Nover vs. United States Rob Emerson
* Light Heavyweight bout: United States Brian Stann vs. United States Phil Davis
* Heavyweight bout: Canada Tim Hague vs. United States Chris Tuchscherer
* Heavyweight bout: Brazil Rolles Gracie vs. United States Joey Beltran
Background
A previously rumoured bout between Renzo Gracie and Matt Hughes will not take place on this card, but is expected to be taking place at UFC 112.[2]
A Middleweight Championship bout between Anderson Silva and Vitor Belfort was confirmed by UFC President Dana White, though it was contingent on Silva's successful recovery from elbow surgery. Subsequently, the fight was cancelled due to Silva's continued slow healing from surgery. The Silva and Belfort bout is now expected to take place at UFC 112.
Antônio Rogério Nogueira had to withdraw from his bout against Brandon Vera due to a fractured ankle. No official replacement bout has been announced. It is expected that Vera will face Jon Jones on March 21, 2010 at UFC Fight Night 21.
Josh Koscheck was scheduled to face Paulo Thiago, but was forced off the card with an injury. Mike Swick has stepped in as Koscheck's replacement and will now fight Thiago.
Mostapha Al-turk has run into visa issues that could prevent the British fighter from making the trip to Las Vegas for the upcoming fight. Both Jon Madsen and Joey Beltran were pegged as possible late replacements to step in and fight Rolles Gracie, before Beltran got the nod as the replacement fighter against Gracie.