The Italian refused to be drawn on his team selection or whether he would pick players who had shone at Wembley in the past - like Didier Drogba.
"Whichever team I select, they have to put in a collective effort to win the game," he said.
"One player alone won't be able to do that."
On paper, Sunday's match is the least important of Chelsea's punishing end to the season, with qualification for the top four their top priority.
But asked whether he would sacrifice FA Cup glory for Champions League qualification, Di Matteo said simply: "I'd like both."