They are exhausted after the EL match. Unlike us, they don't have a bench and they aren't physically prepared to play in serie A and stay so late in Europe and Coppa Italia. On top of it, they have a bunch of midfielders playing in defense.
If they were like this in the first half, I have no idea what to expect in the 2nd half. Half of them might die on the pitch if they try to run. Lets score a 3rd and then we can turn the tv off because there will be very little to see.