Undisputed 3: Redemption (2010)8.0 /10

Storyline:  In a maximum-security prison, inmates are forced to battle in a brutal fighting tournament for their freedom. Yuri Boyka, an imprisoned MMA fighter, wants redemption and a second shot at glory. He must defeat increasingly formidable opponents while also navigating treacherous prison politics. Amidst the chaos, unexpected alliances are formed. You won't want to miss this relentless, highly intense showdown.