Not surprising to see these two teams leading in the Serie A because Juventus in the team they are not racing in tournaments like the Champions League and while they have many good and strong players in the team with a good coach, they also had good times for recovery and Inter Milan is the same team they were in the final match of the last Chmapnis League and they are still in the good format even after losing some palers like Lukaku. I think even Juventus can win the race against Inter Milan if they use the possible opportunities from the mistakes of Inter Milan.
The moment when the UCL starts will probably be a good moment for Juventus, because maybe Inter Milan will start to have to divide their focus. Namely in Serie A and at UCL. So it is possible that Inter Milan will even start playing more carefully in Serie A to avoid injuries to their squad players so they can still perform optimally in the UCL.
That's when maybe Inter Milan could get some draws in Serie A which would allow Juventus to have more points than Inter Milan. And now even Juventus is starting to look like it is developing for the better. They become more productive in scoring goals. And Juventus can also continue to concentrate on Serie A.
I never understood "divide attention" part when teams are playing in multiple competitions. I can understand "tired", and I can understand morale as well, but why would they not want to win all the games they ever play. League should continue the way it does, is it possible for ınter to win UCL? Maybe, there is a small chance, but when we are talking about Serie A, it is 100% guaranteed that they will win that one if they put their entire focus in that case.
So, they should keep trying to win the league games, and if they can win the UCL games as well then great but they should not put all their eggs in that basket since even their best version may not win that cup. This is why picking the easier option and trying to win the league sounds more reasonable.