Gianfanco Zola says AC Milan should've fought harder to keep Sandro Tonali.

The midfielder is joining Newcastle United in an €80m deal.

Zola is surprised Milan cave so easily when Newcastle made their offer.

The ex-Chelsea striker told La Gazzetta dello Sport: “Milan are a fantastic team, to me they'll always be among the best in the world.

"Of course, the player's will may have counted, it's hard to reject certain offers, but if I were Milan, I would have tried to keep him."