"What I saw from United didn't surprise me, we know they have been playing really well in recent weeks," he said.
"Then when they started scoring the goals it became harder for Roma, who maybe felt that it had become impossible very early on in the game.
"And if you lack confidence like that, and the other team are playing well, it is always more difficult to respond.
"We are in a very good position, to be in the semi-final is surely a great success for us. To do that twice in three years is really important, but now we want to make sure we win the final again.
"We were not intimidated by the football we saw from Manchester United, we have always known they have great character, and they are in very good form at the moment.
"But if I was offered the chance of playing Manchester United in the final I would be happy and say yes, because that means I will be in the final too. We would be confident of success if that occurred."