Napoli must have been the happiest in this matchup because they know the Italian teams very well and they haven't lost this year apart from Lazio and Inter. I'm sure they will leave Milan out of the champions league. Milan, on the other hand, should be very upset to be paired with Napoli because Napoli are currently one of the strongest and in-form teams not only in Serie A but also in Europe.
Who would have thought that a day like this would come where we would be discussing about 3 itallian teams in the UCL quater finals with a possibility of seeing one of them play in the finals. I think it all started with Juventus they invested hugely though they didnt get the reward but one thing i feel stood out was the signing of CR7 gave a major boost to serie A as a whole and from then on the story has changed, theyre doing well in the area of scouting and most importantly keeping their talents.