Napoli should take lessons from the defeat, even though their opponent was Lazio. They missed the first place and now they have to wait for Atalanta defeat to jump in front of them. The problem is that Atalanta recovered very well after the weak start and they look like unstoppable right now. Their defeat against Real Madrid shouldn't affect them since they did quite well and scored two goals which is good in my opinion.
That's when a team is lulled by the competitiveness they show and in the end they lose concentration and have to lose two consecutive matches against one team. The first defeat should be an evaluation for the team and they can learn from it to make changes in the second match, but what happened was that Napoli did not learn from their mistakes. The defeat to Real Madrid in the Champions League should not affect Atalanta in Serie-A because they are still maintaining a positive trend and still have two points above Napoli in Serie-A. Both Atalanta and Napoli still have the opportunity to compete for the trophy, but how far can both be consistent until the end of the season.