Despite being favourites to lift the trophy, Platt is certain that City will not underestimate their opponents.
"Roberto Mancini and ourselves won't be thinking about FA Cup finals on Wednesday," Platt told Sky Sports News. "The cup final can wait until late in May.
"Cup final are cup finals, stranger things have happened and our focus is on Wigan, Tottenham, West Ham, Swansea and maybe one more - we have four or five league games to concentrate on before a cup final."
City will face Wigan Athletic in the final in May.