I agree with you it can happen, not unusual. Because Inter are much more experienced and stronger than Juventus. However, this season Juventus lead the Serie A title race by one point over Inter. However, even though Juventus is in a good position so far, there is a lot of doubt about whether Juventus will be able to maintain their consistency in the future. Because Juventus squad is not that strong. But it must also be accepted that Juventus will continue to try their best to win the Serie A title this season.
It is impressive to see how the three top teams are doing right now. It's all about winning for them and Inter Milan is still one game behind, so I think the positions will be switched very soon again. But Juventus is stepping up their game and at first I thought that Inter Milan would be without serious competition, but seeing how Juventus is now performing and even AC Milan is doing well, Inter knows that they have to win their games. Juventus Turin isn't giving them an easy time. What a tough race it is for now. I hope it stays like that until the end of the season.