Lionheart is a 1990 action film, directed by Sheldon Lettich, starring Jean-Claude Van Damme and co-starring Brian Thompson, along with Harrison Page, Deborah Rennard, Lisa Pelikan, and Ashley Johnson.
The film stars Van Damme as a paratrooper legionnaire; when his brother is seriously injured he returns to Los Angeles to enter the underground fighting circuit to raise money for his brother's family.
Arguably one of the essential Van Damme films in the view of fans, the film's cast and crew included two people that had appeared in an earlier Van Damme film: Michel Qissi (a good friend of his) and Sheldon Lettich. This was the second time Qissi played a villain in a Van Damme film, the first being notably as Tong Po in Kickboxer (1989). Lettich helped write one of Van Damme's breakthrough films, Bloodsport, along with another Van Damme film, Double Impact.
(Summary from Wikipedia)