The Italian side have been linked with a move for the 19-year-old striker in recent weeks.
“An interest of Juventus? These rumours are pleasant, but I think Macheda is not for sale,” Giovanni Bia told calciomercato.it.
“This is not the time to talk about the market. Federico is only thinking about the Under 21s and Manchester United.
“He plays in a great team and he would think two thousand times before leaving, even if the club ever thought about selling him.
“Sir Alex Ferguson always speaks well about him and declares him non-transferable.
“It’s something normal that clubs take an interest in him also because he is very young.
“But he is happy in Manchester.”
