Yuri Boyka is the main character of the Undisputed film series, serving as the main antagonist in Undisputed II: Last Man Standing and the titular main protagonist in Undisputed III: Redemption and Boyka: Undisputed. He is a Russian prison fighter who once reigned over the Chornya Cholmi Maximum Security Prison as the undisputed champion until his defeat at the hands of George Chambers.
Years later he works to recover physically with a changed mindset, resuming his goal of becoming the most complete fighter in the world.
He is portrayed by Scott Adkins, who also portrays Cain Burgess in Avengement, Casey Bowman in Ninja and John in Universal Soldier: Day of Reckoning. Standing at 5’10 with a weight of 202 lbs, Boyka is a strong man with a powerful physical build worthy of his reputation as a fierce fighter.
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Little is known about Boyka’s past. He is refered to as that he may have originated from Ukraine. At some point in his life he committed a homicide which led to his arrest and imprisonment at Chornya Cholmi. Once there he rose to the top as an extraordinary combatant inside the prison’s fighting program, being revered for his strength and feared for
his brutality and sadism against his opponents. By the time he is first introduced, Boyka holds a record of 34 wins and 0 losses, making him the Undisputed champion and a legend among the inmates. During this time he was also approached by Gaga, a Russian gangster who made a fortune by betting on prison fights and went on to profit from Boyka’s winning streak.