Motta is known to be an admirer of the young attacker as he once claimed that the Dutchman reminded him of his former team-mate and legendary Brazilian footballer Ronaldinho.
Speaking to Sky Sport Italia, Motta said: "He said that his idols are [Zlatan] Ibrahimovic and [Gabriel] Batistuta, who are two excellent players, but, seeing him day to day, he reminds me of the Ronaldinho I played with at Barcelona. But I cannot compare him to anyone. He is just Joshua, and he is special."