Answer
The answer is _King Arthur_. Mads Mikkelsen portrayed the role of Tristan, one of the Knights of the Round Table, in the 2004 historical action film directed by Antoine Fuqua, starring Clive Owen as King Arthur, Keira Knightley as Guinevere, and Ioan Gruffudd as Lancelot. Mikkelsen's character possesses exceptional combat skills and loyalty towards his kingdom and King Arthur.