The Gunners won 3-1 thanks to goals from Jurrien Timber, Noni Madueke and Gabriel Martinelli.
Asked what pleased him most from the night, Arteta stated: “Probably the desire, the attitude, the consistency in every action, how the team and the individual are connected constantly, the purpose, the aggression that we play with against a team that is constantly man-to-man.
“Psychologically and mentally it's very difficult because you win some duels, you lose others, and you have to go into the next action. And we talked about that and I think they dealt with that part of the game incredibly well.
“I'm so proud of the team, of the players, of the atmosphere that again we have created,” he continued. “The way we have connected throughout the game. It’s unbelievable, because I think we played the best team in Europe.
“They are incredibly well coached, they have so many solutions and talent. We knew it was going to be a long match, but I think the way we played individually, I think everybody excelled at this level. And that's what you have to do if you want to win against these teams.”
Madueke and Martinelli struck after coming on in the second-half, with Arteta left delighted with the hunger his players are showing.
He explained, “We bring people in because Leo (Trossard) had to come off and Noni is ahead of schedule, and he's ready to come and score his first goal for the club, which is great. Martinelli comes in, Richy (Calafiori) comes in; the first action he puts the ball in and he creates an assist.
"And then great to have Martin (Odegaard) back, to have some minutes with Ben (White) as well. So, everybody's so willing. They want it so badly and you can sense that.”