The hosts went into the break trailing 2-0 and needed inspiration with their coach Guardiola serving a one-match touchline ban up in the stands.
Arteta claimed his side's reaction in the second half was superb, not an adjective that many Mancunians present would have selected, although he was probably correct in saying City created more chances after the interval than before it, even if that was not saying a lot.More news: Liverpool Boss Jurgen Klopp Delivers Staggering Virgin Analogy Ahead Of PSG Test
Manchester United face a potential banana skin as they travel to Switzerland to take on the Swiss champions Young Boys and only three points will do as Jose Mourinho's men bid to bounce back from a sluggish start to the Premier League season. "We came in at halftime a bit deflated I think".More news: Democrats Call for Delay to Kavanaugh Vote amid Sexual Assault Accusation
"We weren't consistent in the way we tried to play and you pay the price at this level".
The setback on Wednesday night leaves City at the bottom of Group F, although a 2-2 draw between Shakhtar Donetsk and Hoffenheim means that Pep Guardiola's team are just a point adrift of second spot.
Defeat is City's fourth in a row in the Champions League, but Arteta said they were "well prepared" for the match.More news: Concourt rules in favour of personal, private use of dagga
"I wouldn't like to use that as an excuse because we had that type of crowd in the Champions League before and we were able to win".