Heinze said: “If we win the final it will silence Chelsea because then nobody would be able to doubt that we have been the best side this season.
“Our objective is to win the FA Cup to clinch the Double and to confirm that Manchester United are the owners of English football this year.
“Chelsea will be out for revenge after we took the title off them, but if we play with calmness and intelligence, we know we will come out on top.
“We are going to London full of confidence. After losing to AC Milan in the semi-finals of the Champions League, we had to make sure won the title. We did that – now for the FA Cup.”