Tyrhallan's eyes changed for a moment at the mentioning of the man's name and Battalion. 
The fact he was still alive, was quite miraculous. Not unlike his own Vanguard Battalion they were close to the front, they usually took the hardest hits, since the main focus would be on them, unlike Tyrhallan's who were truthfully more comparable to raiders.
Knives with stealth, leaving the enemy in disarray. 
The insulting string of words Arn let out would have earned him a couple of demands for a Duel if he was facing any other knight.
"Yes, thank you." He said curtly and coldly, keeping in mind that the man either simply didn't care for manners or simply wasn't aware of his own rude behaviour. 
Tyrhallan wasn't going to flare up for this man's enjoyment. As far as he was concerned if the man was actively trying to goad him into a reponse then he was truly to be pitied indeed. 
It also didn't contribute to the actual sparring match.
Tyrhallan wouldn't bite anyway, he stepped away from them, making sure he gave orders to his Sergeant before disappearing, though as soon as his men would hear of the Duel they would want to observe it. It was only fair that he would inform them.
"We will reconvene at your suggested location."
Undoubtedly the bets would be placed.