Roberto Mancini expects the Manchester derby to be the decisive game in the Premier League title race after his City side lost top spot to rivals United.
City slipped from the summit for the first time since October following a 1-0 defeat at Swansea City on Sunday at the same time as United were beating West Bromwich Albion 2-0 at home.
The results ensured reigning champions United now hold a one-point advantage with 10 games to go, with the two clubs scheduled to meet at the Etihad Stadium on 30th April.
Mancini was not unduly concerned about slipping down to second spot and has called on his City players to stay together in the battle for the title.
"It's not important what United did," said Mancini.
"We will fight against them until the end. We have 10 games to finish the championship and every week it can change.
"It's important we remain together. It's better to be at the top but it doesn't change anything.
"This championship is very long and there is time to go. We won't change our target.
"This was not a critical game. The championship will be decided three games from the end of the season.
"We've been at the top for six months. We might not be at the top now but United had an easy game. We are just one point behind.
"We know this can happen. United can go top. It's important for my players to lift themselves. I think they can do that."