Fight to the death.
You can save your pathetic life, though. Hold up two fingers for your Dominus to see. You shall live, but he decides what to do with you afterwards, and I guarantee... Most prefer death. All honor is lost. And if you're The Champion you will lose your status to the one you're fighting.
Roll the dice. The one with the higher of the two or three number inflicts an injury.
5 Injuries and you are pinned. Hold up your fingers or die a warrior.