Wojownik (2007)

The film chronicles kickboxer Marek Piotrowski's ascent to prominence following his amateur world championship victory and subsequent move to the United States, where he achieves US and World titles. His success draws the attention of Hollywood, leading to a movie opportunity. However, after losses to Ricky Roufus and Rob Kaman, his health and life deteriorate. Dealing with personal turmoil – including a divorce and the discovery he is not his son's father – he returns to Poland to restart his life.