Mancini expects better transfer work this summer following the arrival of former Barcelona figureheads Ferran Soriano and Txiki Begiristain as chief executive and director of football respectively.
He said: "Ferran came from Barcelona and understands what it needs to be a top club. Txiki played football and knows football.
"They are good men. For this reason, I am optimistic about our future. We now have people who know their football."