Of course, Napoli's chances are bigger than their rivals (Milan, Inter or Benfica). If we talk about potential semifinals first, Benfica might be considered below Napoli's squad level, but we also can't guarantee Napoli's victory yet because both of them have performed well in their respective domestic leagues. For me, the possibility of Benfica giving a surprise is still there even though Napoli is the favourite. There are things that I cannot predict from Benfica's strength later, therefore, if in the first leg of the semifinals (if Napoli vs Benfica), Napoli wins with a score of more than 1 goal, from there I will believe Napoli will go to the final.
Of the 4 teams that are in the same table, Napoli is the top team to advance to the final round. AC Milan, Inter Milan and Benfica are still under the performance of Napoli. What's interesting is where the 3 Serie A teams will meet each other in this round. Actually I regret this, because there is no chance for an Italian derby in the final round. Of course it will be more interesting to see them meet in the final round than in this round.