Fergie was full of praise for Wayne Rooney who scored an injury-time winner that sent United to Wembley with a 4-3 aggregate win over rivals Manchester City.
Ferguson told Sky Sports: “I thought Rooney was much better today than he was on Saturday (against Hull City), and yet he scored four goals on Saturday.
“His control, leading of the line and penetration was absolutely fantastic. It was a true world-class performance.”
He continued: “It’s a derby game, and you like to win your derby games.
“The atmosphere tonight, and the fact it was a semi-final tie, added a lot of spice to the match.
“And the fact we scored so late in the game brought a special type of celebration.”
He added: “I think we kept our patience, I think this was important.
“Nothing really happened in the first half. They sat very deep.
“What we said at half-time was to keep playing our football and keep spreading our play.
“I am proud of the team. I also must pay tribute to our support. They were unbelievable.”
