The Belgium international was given a straight red card for a lunging tackle on Nani, but replays revealed that the defender took the ball before colliding with the Portuguese winger.
The Italian coach was not happy with his captain’s dismissal, and has admitted that the Etihad Stadium outfit will challenge the decision.
“We will appeal. I am sure we will win,” Mancini told reporters after the game.
“I don’t want to talk about the referee because I want to stay on the bench for the next game. But I think it is impossible.”
Kompany also commented on Twitter, and was full of praise for the fans and every one involved with the club.
“The fans, the players and every single person involved with Man City FC were incredible today. Definitely the moral winners of this game,” he stated on the social networking site.
If Kompany’s sending off is upheld the centre back will miss four games due to it being his second dismissal of the season.
Such fixtures will include the Carling Cup semi-final against Liverpool and a tough league game against Tottenham.
By Gareth McKnight