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If I consider the total goals and total conceded by Juventus so far this season in Serie A, in fact Juventus still has good results and is only slightly different from Napoli who is currently at the top of the standings. So far this season in Serie A, Juventus has a total of 34 goals and Napoli has 35 goals, and for the total conceded Juventus has conceded 17 goals and Napoli has conceded 14 goals so far this season. With such records, basically Juventus is still fine in attack and defense but indeed, what is very unfortunate is that Juventus has drawn more.
Juventus and Napoli are not much different in their goal productivity so far, but look at the second points tally and it is very far away. Napoli leads the standings with a gap of 13 points above Juventus, even if Juventus is unbeaten until week 21. Juventus has recorded more draws this season and that is why they cannot compete closely with Atalanta, Inter or Napoli. The match between Napoli and Juventus is certainly one to look forward to, but Napoli's chances of winning the home match seem very big.
If Juventus is able to maintain its unbeaten record in that match, then Inter will gain an advantage considering that Inter is only playing against Lecce. Inter have a 3 point gap under Napoli, so if Napoli lose points then it will be a threat to them.