Mikel Arteta was issued a touchline ban in the 1-0 defeat to Aston Villa last December.
He'd picked up three yellow cards in the first half of the season and had to watch from the stands as Arsenal lost to Villa.
Ahead of Sunday's game, when asked if that punishment has impacted his behaviour, the Arsenal boss replied via ESPN: "It's possible that I think like that.
"Can I control it sometimes when I am there? Sometimes it's been better.
"Across the season if you look at all the managers who have had bans it's not a coincidence that they've all been there.
"It was an experience. I deserved it. I had to go upstairs because I got the yellow cards. I experienced it. I didn't like it so hopefully it doesn't happen again.
"The rule came up and it was very aggressive. Every time we were talking it was like 'oh you're going to get a yellow card'.
"I think now it's a bit smoother as well. There's a bit more understanding in both ways of what we expect from each other, that's it."
Indeed, Arteta has been calmer on the touchlines lately even when decisions didn't go Arsenal's way.
For example, he neither reacted to Bukayo Saka's furious penalty claim against Bayern Munich nor did he raise a hue and cry about it in his post-match interview.
The defeat to Aston Villa at the time left a bitter taste in the mouths of fans. With both Arsenal and Liverpool tied on 71 points, the Gunners desperately need to get a win this time.
