But despite the enormous task ahead of them, Mancini still believes City have a solid chance of making it through to the next phase.
"It's a tough group," he toldIl Domani dello Sport.
"Villarreal are almost out, there are three teams for two spots.
"I think that with 9-10 points the qualification is possible. Napoli-Bayern will be the key match: it won't be decisive, but will give a direction to the whole group.
"Bayern are very strong, but in Munich there were two clear penalties for us when the score was 0-0. Their goals were casual and we were out of the match after 2-0."