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.
This is a possibility but I doubt this will affect Inter. Inter have been playing in the Champions League and the Seria A all season long yet they're still at the top of the table. Inter are highly motivated to win the league title this season and they're in good form.
The Italian Cup win is an extra motivation.
Juventus is also in good form but I feel Inter is better. A difference between them is that Juventus don't have players that are currently hot as Inter Milan players.
Lautaro Martinez is currently on fire and he's leading Inter's attack very well. It's going to be a tough battle for both teams but I feel Inter will win the league.