Gareth Barry finished off bottom club Reading with a controversial headed winner in the 93rd minute at Eastlands on Saturday to move City within three points of United. This lead was increased by a point after Swansea held United to a 1-1 draw on Sunday.
It was the fourth time this season City have won a league game with a goal in the 87th minute or later following similar successes against West Bromwich Albion, Fulham and Tottenham and Mancini joked that the stress of his team's performances may yet take their toll. Mancini said: “I’m very happy but we’ve had a lot of games like today. My heart is not strong enough to take it.
That win could probably be the difference come the end of the season. I hope so. Our attitude is good. We kept our concentration until the very end. We wanted to win this game and we kept going until the very last second. This game is important,” he added.