Who is the best upcoming Manchester United player?

Manchester United has a lot of young talent in its squad, Rossi and Pique are two of the latest young players to showcase their skills. Several other youth players and young reserves are out on loan to gain experience, which brings us to the question;
who is the best young or reserve player in the squad right now?

Personally, I would like to see more of Rossi. He has been scoring goals everywhere. What's your opinion?

Which player are you most excited to see play first team football?