Glory
This is the reason you got into fighting in the first place. It's all about vanquishing your opponent so you can be hoisted onto the shoulders of your training staff to the screams of thousands—or dozens, depending on the venue—and carried about the arena in celebration of your achievement. It's been a long time since ancient Rome fell, but thanks to you we still have gladiators to root for.
We hope it's all worth it to you, because you'll have to pay for each and every bout with your blood, sweat, and tears. Good thing you have a nearly unlimited supply of each. Just try not to lose too much of the first one at one time.