He still fights in underground matches in Kyiv, Ukraine. Martial artist Yuri Boyka is now a free man and has a manager named Kiril. The film takes place several months after the events of the previous film. Scott Adkins reprises his role as Yuri Boyka. It is the sequel to the 2010 film Undisputed III: Redemption.
Boyka: Undisputed (also known as Boyka: Undisputed 4), is a 2017 American-Bulgarian martial arts film directed by Todor Chapkanov, and written by David White and Tony Mosher from a story by Boaz Davidson.