“What the young kids don’t see with Jack Grealish is the hunger and hard work behind closed doors – the attention to detail and the way he trains.
“He has changed his regime and looked at himself and asked what he can do better.”
However, Ferdinand’s former United team-mate Gary Neville stated earlier this month he has doubts over a potential deal for Grealish.
Neville said on Sky Sports: “I think it’s very unlikely United will go for Jack Grealish as good as he is.
“You think of Van de Beek, Pogba, Fernandes, the type of players they have.”