Caceres needs to play. he is in a period of growth, into our team, and also into italian football...Grosso is likely on the left, as he is our best left back.
In the middle. Canna will play, probably with Legro, which is unfortunate, but I will hope that Ariuado makes the bench, and has at least the chance of an appearance.
So we have, almost for definite: Manninger, Cac, Legro, Canna, Grosso.
With Poulsen and Momo OUT. we are left with Melo and Marchisio. A game like this, against the weakest team, on form, in the league, is perfect for our players to regain some confidence, so Melo must surely play, despite his obvious mental problems.
Camo OUT...we would all like to see Giovinco, and Diego must play. because he is our most talented fit player.
the problem here is that Tiago is not at all suited to playing ANYWHERE but centrally. so unless we go Diego-Tiago-Gio, which suits Tiago and Gio, but perhaps not Diego, I can't see Ciro going for including our two flair merchants in offensive midfield positions.
What would be more sensible would be the following:
Melo Tiago Marchiso
Diego
Trez Gio
That does not offer much support on the flanks though, other than through the fullbacks...though Gio will naturally drift out there and towards midfield, making it more like 4-3-2-1 than 4-3-1-2.
We need to play our best players. That is the only way they are going to find form.