London: The English Premier League title race burst back open as Manchester City closed to three points behind a faltering Manchester United side.
Sergio Aguero and Samir Nasri scored the goals as City won 2-0 at bottom side Wolves - who are now relegated - just hours after United conceded two late goals to draw 4-4 at home to Everton on Sunday.
With three games each remaining, United lead City by three points but City have a superior goal difference and the two sides still have to meet at City's ground on April 30.
"We've got to get a result at Etihad Stadium now," United manager Sir Alex Ferguson said.
"It's a derby of amazing proportion - probably the most important derby game in my time. We have to go there, perform in right way and not give away goals."
United led Everton 4-2 with seven minutes to go at Old Trafford but late goals by Nikica Jelavic and Steven Pienaar secured an unlikely draw for Everton.
Ferguson was livid at the way his side had let slip a winning position.
"We've thrown it away, no question about that," he said. "It's hard to imagine [how] it happened, how poor we defended.
"It was a bad performance by us, they were soft goals, yet some of our football was magnificent and our forward play didn't deserve that."
Jelavic put Everton ahead on 33 minutes but goals from Wayne Rooney, Nani and Danny Welbeck made it 3-1 to United on the hour mark.
Marouane Fellaini pulled one back for Everton but when Rooney scored his second on 69 minutes, the match looked over.
Patrice Evra headed onto the post soon after but Jelavic reduced the deficit and Pienaar struck with five minutes to go to pull off a remarkable draw.
Rio Ferdinand almost won it for United with a shot in injury time that was brilliantly saved by Everton goalkeeper Tim Howard.
"We had a chance to make it 5-2, hit the post and they went up the other end and gave themselves hope," Ferguson said.
Everton manager David Moyes was understandably delighted with his side's resilience as they moved two points clear of Liverpool in seventh.
"The effort they put in was absolutely brilliant," Moyes said.
"We came to win the game, we felt we had been a bit hard done by lately.
"Today was a chance to play in another big game and stop people thinking our season was over. I don't think at any time we deserved to be two goals down."
City manager Roberto Mancini has consistently written off his side's chances of overhauling United at the top.
But the Italian was jubilant as Aguero put them ahead with a nice finish from a great pass by Gael Clichy on 27 minutes.
And Nasri made sure of the points with a finish after a free kick 16 minutes from time to also secure Wolves' relegation to the Championship.
Elsewhere on Sunday, West Bromwich Albion manager Roy Hodgson enjoyed a successful return to his former club as his side earned a shock 1-0 win at Liverpool.
Jordan Henderson and Dirk Kuyt hit the post for Liverpool before Peter Odemwingie won it for West Brom on 75 minutes, lifting them to within one point of eighth-placed Liverpool in the table.