After advancing into the FA Cup fourth round by beating Leicester on Tuesday, City will turn their attentions back to the Premier League on Saturday when they visit Aston Villa.
Although they remain outsiders to be crowned champions in May, it cannot be discounted given the form Roberto Mancini's men have been in recently and Vieira is adamant the Blues will not be found wanting when it comes to the mental side of the game.
"We are a group of winners," said the veteran midfielder. "You can have all the talent but if you don't have winners in your team it is really difficult to win something.
"But in every position, we have them. With those kinds of players, the fans can be proud. More importantly, the future looks really good."