With this point loss, Napoli will have a very hard time in the championship race. I don't think they can be champions anymore.
It's funny that in the last games involving these two teams, even Lazio has been doing better than Napoli. Even in cases where Lazio is having bad results when playing against other Serie A teams, they manage to win in games against Napoli. I can't understand why Napoli, who were doing well, tend to lose when they play against Lazio.
source: https://livescores.biz/h2h/lazio-vs-napoli
I also agree that Napoli will not win the title this season. I see Atalanta and Inter as the two teams that have the best chance of winning the title. Inter in recent years has been a team that always fights for the title, but Atalanta is the team that is surprising me the most this season.
Napoli have lost their previous matches against Lazio and this match is also a pity for Napoli. It is interesting that the team that is currently at the top of the table and has played the best but has not won a match against Lazio this season. In Serie A, Lazio is not performing well against all the other teams but they are strong against Napoli, maybe it is their confidence. When Lazio enters the field against Napoli, maybe their confidence will come back and they will win and they will play strong accordingly.
Yes, I also believe that Napoli may not win the title this season, their style of play has changed. Napoli started the season well but now their performance is going down day by day so they may go down a lot by the end of the season. However, Inter and Atalanta are two teams that can compete for the title. Atalanta's performance has improved a lot so they will definitely try to play better, but Inter can improve their performance a lot until the last minute so they will have a chance. It is really surprising that Atalanta has become a much stronger team in Serie A at the moment so they will play a big role in winning the title.