Moggi says sports director Alessio Secco didn't do his homework on the pair.
He told TMW: "Obviously he sees it another way.
"I think Melo's ability is good but not as a director, he is a defensive midfielder. They have given away (Cristiano) Zanetti thinking of replacing him with Melo but were wrong in their assessment of his role.
"As for Diego, I think he is a good player, but one who hides. He never goes into the hot zone of the pitch to avoid taking the blows. Juve do not need someone like that."