How he lost? Sure. How Arthur fights now? Not so much. Back then, Arthur was bold and brash and charged in headfirst the first chance he got. He was devious and didn't care about honor or respect for his opponent. Now he's an entirely different animal. He observes, calculates, and thinks before he acts. He gives his opponents a chance instead of going all out straight from the gate. He's more cautious but also more cunning. The man Adrian is fighting now is very, very different from the one he fought before, and if that doesn't confuse Adrian, it would at least cause him to re-evaluate what he thinks he knows.

I'm just asking that you be more prudent about the reasoning behind Adrian's actions. If he went after Gregor because he inferred that it would be possible for Arthur to electrocute him through the water, then write that. Don't write that he remembers how Arthur fights and use that as the reason when he never saw Arthur display the fighting style and cadence he's using here.