Um... what's up with the arena battle outcomes?

[Alba Kebab]

A few possibilities:
Your opponent was going to swing before you next round, and the swing would have killed you, so enforcer stops it and calls the match in your opponent's favour.
Your opponent either has higher presence, or grim determination skill trained, that made the enforcer lean in his favour when both of you are in critical health - even if his absolute hp is lower than yours.

But if it's happening to you a lot, then I guess your glad have low presence.

Some of the flavour text isn't just for show either, judging by the fact your opponent has a zealous fan run out to greet him at the end of battle, I presume the crowd just don't like you.(with your presence) :P