Please help me find this movie about a fighter

All I can remember is that it is a movie with a very good looking actor who is in some kind of tournament with other fighters that he eventually wins by killing all the others, there was a lot of blood and I think a guy who is watching every fight in a television (the main anthagonist), and if I’m not wrong there’s also a girl that he should save. All in some kind of post apocalyptic world.