Find the movie

Hello friends
I saw a beautiful movie in the fighting style when I was a child
I remember that it was a place like a prison where many fighters were imprisoned there.
Each of them had their own weapon
But this movie was not fiction
Struggles were natural
Combat, similar to kung fu, ninja, boxing, and samurai together, (hand to hand) each pair that was chosen would fight each time.
Similar to mortal combat
They were fighting in a rectangular roofed hall
The rest of the fighters, who were prisoners, were spectators of every fight
It was very nice
Thank you for helping me to find out the name of that movie
That movie was made about 10 to 15 years ago

Undisputed 2? 3? or 4?