A season's work now comes down to the monumental clash at Eastlands next Monday.
After United's tragic 4-4 draw at OT this afternoon, City now have a brilliant chance to cut the lead down to three. With City's far superior goal difference, United's draw is good as a defeat.
Despite leading by two goals twice, United fell to late Nikica Jelavic and Steven Pienaar goals.
Here are five things we learned from today's match.