2016 film by Todor Chapkanov
Boyka: Undisputed (also known as Boyka: Undisputed 4), is a 2016 martial arts action film directed by Todor Chapkanov, and written by David White and Tony Mosher from a story by Boaz Davidson. It is the sequel to Undisputed III: Redemption (2010), and the fourth installment overall in the Undisputed franchise. Scott Adkins reprises his role as Yuri Boyka.
Plot summary adapted from Wikipedia, licensed under CC BY-SA 4.0.