Juventus boss Max Allegri has set out his tactical plan for their Coppa Italia second-leg tie with Fiorentina.

The Viola hold a 2-1 lead from the first leg.

Allegri said: "We'll play with four [at the back] tomorrow, with an extra attacker, because last time I went to Florence we tried a surprise, we played three and [Fiorentina Coach Vincenzo] Montella knew.

"So someone must have told him. So before anyone can tell him, I'll tell you [the media]. It will definitely be four. I want to give you the advantage on Montella.

"You'll all be on your phones trying to find out the formation, and rightly so, that's your job. So therefore, let me tell you, you know tonight.

"We'll have four, and then in midfield and attack we'll see."