Boyka: Undisputed. (Redirected from Boyka: Undisputed IV) Boyka: Undisputed is a 2016 martial arts film and is the sequel to the 2010 boxing film Undisputed III: Redemption. Scott Adkins reprises his role as Yuri Boyka. Tim Man, who choreographed the action for Adkins in Florentine's Ninja: Shadow of a Tear, serves as the film's fight choreographer.