The Italian made eight changes to his side for the 1-0 victory over West Bromwich Albion at the Etihad on Tuesday night, having claimed before the match that it was a chance for a number of players to stake their claim for a place in the final.
Despite the win, Mancini remains tight-lipped on who will receive a starting berth to face Wigan Athletic in the conclusion of the competition.
Asked if he has now settled on a side for a trip to Wembley this weekend, Mancini told Sky Sports News: "Maybe. We have four days. It is important after this game to recover our strength.
"We didn't take a risk with some players. I think so."
City face Wigan at Wembley on Saturday.