Well there's the 10% chance of 4th we had thrown away!
Even if United beat City it's 7 points with 9 games to go (1 game in hand). If we win that game, it's 4 points in 8 games. Not impossible, but first of all I don't see United winning that game, and I also don't see us winning all our remaining matches. So the United - City game just became completely uninteresting from our point of view. If City win we still have a fair chance to finish above United though, but that's about it.