Rooney, says Ferdinand, is the big-match player who can rattle the favourites.
"When we have needed Wayne to stand up and be counted he has always been there on most occasions," said Ferdinand.
"People talk about big occasions. I think of the (Manchester) City game when he scored one of the best goals you will see at Old Trafford.
"I don't need to go through the times and occasions he has done that."
He added: "Wayne can show his worth anyway regardless of what happened last summer at the World Cup or what happens at Wembley.
"We have 100% trust in all our players."