AC Milan hero Billy Costacurta has offered how he would mark Bologna striker Joshua Zirkzee.
The Dutchman has been a revelation for Bologna this season.
Costacurta told Sky Italia: "Someone like him is difficult to mark, he moves a lot.
"How to stop him? Never one on one. Those so talented, good at defending the ball, not being anticipated or suggesting depth must be marked as a team: there aren't many defenders capable of managing someone like that in a one-on-one situation, great defences are only such if there is mutual help.
"Zirkzee really has many qualities: it seems almost blasphemous to me to say it, but perhaps the least developed point is still that of the finishing towards the goal.
"Although he is already good, there he can improve even more."