After Inter's outstanding match Napoli will have to shift position that is if Inter will win against Lecce which looks visible from all stand points seeing how Lecce are fighting hard to stay above relegation zone. For upcoming weeks we should see both Napoli and Inter fight to win their matches so they can replace each other in the position at intervals.
With 17 or 18 more matches, many things can happen and Scudetto race among Napoli, Inter Milan and Atalanta or one surprising underdog, will have many twists. It seems Napoli and Inter Milan have good lead and advantage now, but it's too soon for eliminating Atalanta or Juventus in this race. The Scudetto race will become clear after 5 or 10 more match days, but possibly it will continue as a race among three competitors or perhaps Juventus might replace Atalanta in this competition.