Zvonimir Boban cannot believe AC Milan allowed Andrea Pirlo to leave for Juventus.

Pirlo signed for Juve on a free transfer after the Rossoneri opted against handing him a new deal.

"It was a resounding mistake to lose Pirlo on a Bosman," the four-time Scudetto winner told the Corriere della Sera.

"We have seen in these first few games of the season how he is playing for Juventus and how useful he still would have been for the Rossoneri.

"Once upon a time Milan signed the best players in the world, now, though, they look at their balance sheet and club politics."