Ferguson believes his squad now is better than the one which won the treble in 1999.
"I could have played a completely different team on Wednesday and I think we still would have got a result. It's not just the four strikers I could change, you could change the entire team now. There were good internationals who weren't even involved on Wednesday.
"It will be a different team when Madrid come here. One, two or three who didn't play on Wednesday could play in the second leg. As I said the other day, I've got all these international players, so why shouldn't I trust them?"