Mancini's side underlined their Premier League title credentials by thrashing rivals Manchester United 6-1 at Old Trafford with a performance that caught the eye across Europe.
City return to action with a Carling Cup fourth-round tie at Wolves and Platt believes Mancini is almost as keen to win that trophy as anything else.
Platt said: "Straight after there was a euphoria. There is bound to be that, not just because of who it was against, not just because of the scoreline, but because of where we sit at this moment in time. But straight after it as well the manager was saying it was only three points like any other game.
"You have always got to put your football boots back on, it is always zero-zero when you start another game. It is something that will be at the back of his [Mancini's] mind, to make sure we don't let what happened at the weekend take away focus on what the position in hand is - and that is progress in the Carling Cup.
"There is a hunger there for success, I think you see that. There is a belief in them that they can do it and the manager is greedy, he wants everything. All he knows is winning and all he wants to do is win. I couldn't believe how disappointed he was last year when we got knocked out at West Brom."