Bologna is one of the more toothless teams in the league. Outside of Diamanti and maybe Bianchi, it's hard to see where they are gonna get goals. Napoli is playing well, but its partially because they don't have to worry about defending much here.
It's at expense of something you know. Their defense doesn't look good and they create big gaps between formations. Teams with better organization will punish them.
I don't know if they're playing good or Bologna is so shit. Did they take at least one shot on goal?
