Boyka: Undisputed (also known as Undisputed IV) is a 2017 American martial arts film directed by Isaac Florentine, and written by David White and Tony Mosher with a story by Boaz Davidson. It 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.

The film takes place several months after the events of the previous film. Martial artist Yuri Boyka is now a free man and has a manager named Kiril. He still fights in underground matches in Kyiv, Ukraine. In a match, Boyka accidentally kills his opponent Viktor. He begins to regret this and thinks about what he is fighting for. After discovering Viktor has a wife named Alma, Boyka tells Kiril to make a fake passport and goes to Russia to meet Alma.

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