We can play 4-2-3-1 only if Camo is fit.
Against Napoli we saw how important Camo is for this 4-2-3-1 formation. When he got injured Ciro simply just swapped him with Tiago, but Tiago is no Camo nor even a winger, and Napoli started to dominate our right sight. That eventually made also Grygera...