Although Ferguson was prepared to invest up to £17million in Nani when he signed the Portugal international from Sporting Lisbon during the summer, the United boss made it quite clear it was a purchase for the future.
"I must confess, I was never expecting to be in the first-team so soon," said the 20-year-old.
"I was well aware of the quality of my team-mates and I knew I would have to work very hard to break into the first XI.
"But things have happened very quickly for me and I was lucky enough to get a chance to show the manager what I can do.?
"I would not say I am an automatic selection, not at all," he said.
"The only thing I can say is that it is important to do my best every time I play and help the team to win.
"I have had to adapt to a very different lifestyle in Manchester but I am gradually getting used to it.
"English football is definitely different. The tempo is much higher and it is a quick-thinking game.
"But I actually think that works in my favour because that is how I like to play. Coming over here was the best thing for me."