There are four rounds one needs to face before one can be selected as the quarter-finalist. Every battle would be two-on-two, where the participants either have to completely incapacitate their opponents or make them surrender.
There are no rules here; you can kill or permanently damage your opponent, and that's why this tournament is known as the contest of savages.
After you qualify in the quarter-finals, the participants are no longer allowed to participate in the pairs. They all will have to fight individually to advance into the semi-finals and then finals.
Alex and Rebecca would be participating until the quarter-finals. After that, Rebecca was unsure if she would continue. Although she was battle hungry she doesn't think she would find competent challengers here.