I would play Giovinco, I would even change the entire formation to suit his style best. He is by far our best creative force in the team, it's an incredible waste to leave him out.
-----------------Buffon-------------------------
Grygera-----Legro---Chiellini------De Ceglie
----------------------Sissoko--------------------
-----------Camo--------------Poulsen/Zanetti-------------------------
--------------------Giovinco------------------------------
-------------Amauri------------Del piero----------------
Camoranesi gets a more central roles where he can start/build up plays, Poulsen and Zanetti can play the destroyer/distributer roles while Sissoko plays purely as our destroyer.
Giovinco plays as a traquerista where he creates the plays for Del piero, Amauri, or Trez. He will be our creative force along with Camo, and occasionally play on the left wing with Camo playing on the right. Both players will have the freedom to move and invent as they please. Nedved can easilly replace Giovinco, although he will not be as effective creatively.