City drew 2-2 with Liverpool on Sunday to fall nine points behind rivals Manchester United.
“The championship is not over, absolutely not, because of last season and also two years ago [actually three]. I don’t think it is finished,” said Mancini.
“There is room for mistakes. I think we probably need to win all of our games but, if not all, 11, 12 games. But this is football and this can happen sometimes.”