"It was a superb performance, he has so much great energy," Ferguson said after the tie.
"He was a jack in the box all day."
On the teams overall performance, the United boss added: "Everyone was fit, fresh and bursting to play.
"It was exciting right from the word go, with energy and enjoyment.
"It was a tricky tie, Fulham were in form and we had to respect that. The last thing we needed was a draw."