The Portuguese midfielder has made a massive impact in his short spell at Old Trafford, but he acknowledges that opposition defences will now have had time to study him properly.
He told Talent Ain't Enough: “My vision of coming to Manchester United is that I'm at one of the best clubs in the world, for me, the best club in England.
“My idea for the next years are doing better than I have until now.
“For me, in games it is not good enough because now is maybe the most difficult part. The players start to recognise your game, start to know how you move , how you pass, how you shoot and the things become difficult now.
“So now I need to improve more and to work more and understand more the teams who I play against because they will understand me better, but I need to be prepared to understand better the difficulties they can have."