Undisputed 3: Redemption (2010)

Eight incarcerated brawlers compete for their freedom in an underground fight to the death funded by a powerful underground gambling ring. Rovi Scott Adkins returns as Uri Boyka, an inmate trapped in the toughest prison in the world and ready to make his comeback in a lethal boxing competition for a shot at freedom. Upon realizing that his mysterious benefactors have no intentions of letting the winner reap their reward, Boyka launches into a fierce battle to bring the crooked syndicate crumbling to the ground, and expose their inhumanity in the process.