Roberto Mancini has urged his Manchester City side to force Manchester United fans to tear down the banner they use to taunt their neighbours by winning the FA Cup next month.City are on the brink of lifting their first trophy since 1976 after beating United in Saturday's semi-final at Wembley to set up a May 14 showdown with Stoke.Supporters at Old Trafford never tire of reminding their city rivals of the length of their silverware drought, annually updating a banner that hangs at the Stretford End.It recently ticked around to 35 years and City boss Mancini said: "They can take off this banner. We hope we can take it off this year."City cleared a huge psychological hurdle on Saturday by reaching their first cup final since 1981 and doing so with a victory over their fiercest rivals.Mancini said: "Our mentality will be more strong because we beat United."