On the eve of what the Italian hailed as the biggest Manchester derby in half a century, Mancini said he will use his pre-match team talk to warn his players not to pass up the chance make history.
He said: “We have only one chance, because they [United] lost points against Everton. One chance. After 50 years, Manchester United and Manchester City are playing for the title.”
Although both sides will have two further Premier League fixtures to play, Sir Alex Ferguson said who whoever wins at the Etihad Stadium will go on to win the league.
Ferguson said: “If City win, I think they probably will win it from there, yes. Even though they still have to go to Newcastle. I think they’d have a great chance, but if we win on Monday, we’d be strong favourites.
“A draw and we’d be favourites too, no doubt about that, with two games to go. We’d have to be happy with that, but we won’t be talking about going there not to lose.”