It seems that luck is very much on Barcelona's side this season in the Champions League. Barcelona occupies the last group which is inhabited by teams that tend to be no better than them, so basically Barcelona will be the favorites to qualify for the round of 16 this season.
Yeah, we could say, Barcelona's toughest rival in this group is Porto. And if you look at Barcelona's current abilities and performance, they should be superior. It's really profitable.
Meanwhile, on the other hand, Real Madrid have to be in 1 group with Napoli, I still think that Real Madrid will win in the group, but this is also not 100% because after all seeing Napoli's consistency last season, they could be that good this season too. This is going to be interesting.
It will definitely have a big impact on Real Madrid after Vinicius Jr suffered an injury because this player is a key player at Real Madrid who has many ways to try to give a strong performance for Real Madrid and the skills that Vinicius has, currently there is no reserve player who can replace his position. with equivalent skills.
Currently, Real Madrid is indeed having a few problems. Especially after the injury to Vinicius JR, who incidentally has become one of Real Madrid's key players at the moment for several weeks. Thus, Real Madrid's strength may decrease slightly. But as you said, Ancelotti definitely did his best. Their best option right now is to play Diaz. Maybe he's not as good as Vinicius, but at least he also has pretty good performance, but you could say he doesn't have enough flying time. If he can optimally contribute to the group when replacing Vini, then he could also be a mainstay for Real Madrid. This is a golden moment for him to show his abilities.