"The way we are playing looks much closer to what we want. The way the team is evolving, we have some consistency in recent months," said Arteta.
"We are still giving things to the opposition - we did it against Benfica and we did it today. It's something we have to eradicate to give ourselves the best possible chance.
"It's about how we played against top-quality opposition. We have to impose ourselves - it doesn't matter who we play against, we have to have courage. I'm proud about winning but obviously [also] the way we've done it.