The City boss also hinted the club will consider appealing the young Italian’s red card with Mancini feeling it was harsh decision at best.
“Mario was excellent because he scored two fantastic goals, defended and worked very hard for the team,” he told the club’s official website.
“I don’t agree with the referee’s decision to send him off at all – it was not a red card in my opinion and we will now consider whether we should appeal the decision.
“West Brom put us under pressure for ten minutes after Mario’s sending off but my players fought hard and we deserved our victory.
“It was a great day and I think the players gave a fantastic performance and played some excellent football.
“Carlos is a fighter who never gives defenders a moment’s peace and both he and Nigel are very important players for us.
“We have two days now to recover before we play the derby and we can go into that game now with a lot of confidence.”