Lazio, Udinese, and Milan have the same points only Lazio is superior on goal difference. just like you too, I really salute the developments that occur in Lazio, they look amazing. ciro immobile closed Lazio's win by scoring 1 goal in the 91st minute, he is the top scorer in Serie A with 6 goals.
It's surprising to see the ranking of the class so far. This was beyond my guess before the season started. Juventus, Inter, Milan are off the beaten track. They were missing from the top 3.
Even Roma, who has a fairly good transfer, is playing unstable. It seems that the transfer market later should be used to improve the team's situation. Otherwise it is even possible that Inter, Milan, and Juventus will not qualify for the UCL next season.
AC Milan's performance is not bad. They are only 3 points behind Napoli. However, the performance of Inter Milan and Juventus was surprising. They are playing very badly. Inter Milan are now 8 points behind Napoli and Juventus are 10 points behind Napoli. I don't see any chance of these two teams fighting for the title. Inter Milan may want to qualify for the Champions League. On the other hand, I think Juventus will fail to qualify for the Champions League as well. Their performance is very bad now.