If someone goes out and dominates another fighter and gets a tko, he dominated and earned his win. If he's dominating and then catches his opponent with a huge shot and KO's him, he did exactly that, he caught him. That doesn't take away in my book from the performance, he was just able to catch him, in addition to dominating him.
In wrestling, if someone is up 10-0 and then runs a half and pins the guy, pretty straight forward as to what happened. Now if the same guy is up 10-0 and then hits a defensive spladle, he absolutely did catch his opponent and pinned him. That's the way I see it and in no way does catching an opponnent take away from what was already happening.