Manchester City have had their appeal against the red card received by Vincent Kompany in Sunday's FA Cup third round loss to rivals Manchester United rejected by the FA.
Kompany was dismissed on 12 minutes at the Etihad Stadium after referee Chris Foy deemed the defender's two-footed challenge on Nani an offence worthy of an immediate dismissal.
City went on to lose the match 3-2 and manager Roberto Mancini confirmed after the defeat that his side intended to appeal the four-match ban facing Kompany.
However, a statement on the FA website read: "An Independent Regulatory Commission has today dismissed a claim of wrongful dismissal from Manchester City's Vincent Kompany following his red card for Serious Foul Play in The FA Cup Third Round tie between Manchester City v Manchester United on 8 January 2012.
"Kompany will serve a four-match suspension with immediate effect. The suspension consists of a statutory three-match suspension for Serious Foul Play plus one additional game given this is Kompany's second dismissal of the season."
Earlier on Tuesday, Mancini expressed his confidence the suspension would be overturned on the basis that Kompany did not foul Nani.
''My opinion has not changed,'' he said. ''I am confident because Vinny only played 10 minutes. He was sent off for nothing. He has already missed one game. I don't think about this (being banned). It would be not correct if that happened.''
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