Did you hear or read somewhere how anyone from Juve says that we're after him?
Only his agent said Juve are after him. As far as i know, he might have been already in contact with Milan and he was trying to raise Mattioni's price.
Our directors always tell which are the players we're after and we always know who are we going to sign because Secco, Gigli, Blanc or Ranieri will repeat it at least 10 times.
If they said that we're after Mattioni and i missed it, then you have a point, they lost the bidding war to Milan. But if they never said that we're after him, then what makes you think we were after him?