A Bukayo Saka penalty and a Mikel Merino brace saw Arsenal win a tenth consecutive game - and their 14th out of 16 games this season.
“We want more,” he said after the game. “We can still improve and do things better. That’s the right mindset to have, and we’re happy with what we’re doing. But I’m not satisfied at all, we can play better, defend better, and today we should have done some things better in the opposition half.
“It’s very tricky against them. But I’m very pleased for a lot of reasons - obviously a winning run in the Champions League without conceding a goal, at a really tough place to come.
“And we talked about being emotionally in control, and to not get frustrated when we had to play that game because we’d have the chances, the way they set up, and we certainly can look back on another very impressive performance.”
On the traveling support, Arteta added: "They’re unbelievable.
“We really appreciate the effort, the energy they’re putting in, and I’m really happy that we could get the win to make them really happy on the way back - it’s a long way back now. So, I’m delighted for them and really grateful.”