Answer
Scott Adkins first played Yuri Boyka in 2006. He was the protagonist in the movie Undisputed II: Last Man Standing, and he reprised the role in Undisputed III: Redemption in 2010. He also played Boyka in the 2016 movie Boyka: Undisputed IV, and he is expected to return in the upcoming movie Boyka: Undisputed V.