A sealed concrete square room, and a black ball.
The black ball was a stereoscopic projector, surrounded by a lot of stereoscopic light and shadows, and one could interact with what was on it by walking up and touching it.
They greeted each other and found their position.
There was a countdown to the start of the tournament.
There were twenty-nine minutes until the tournament started.
It also explained the rules for the five-versus-five matches.
The tournament was based on a point system, not an elimination system.
Three points for a win, no points for a loss, and one point each for a draw.
Once the tournament started, there would be a two-minute break for each match that ended, but of course, you could also fight earlier if you felt like it.
The tournament matched those with similar scores and didn't guarantee complete fairness, only relative fairness, as the former was impossible.