Many people have been looking forward to this day, especially the Barcelona Vs Bayern Munich game; Barcelona will try to use the strength of their team to exact revenge because Bayern won their previous match against Barcelona.
This match certainly provided a motive for Xavi. I think if they manage to draw or win the losing record to Bayern Munchen will come to a halt. Xavi has the capital to do that. Xavi has players of the same quality as Bayern Munchen, they are only different in mentality. Munich is certainly more confident because playing in Germany while Barca will certainly get pressure from the twelfth player.
Bayern Munchen and Barceona have the same points, naturally interesting. There are inter too who are ready to make a surprise, but in Group C I think it will be Bayern Munchen and Barcelona who will qualify for the knockout phase.
Xavi has been able to change Barcelona for the better maybe his previous defeat in the UCL would be revenge but it is possible that Bayern Munich are also very tough opponents but with a draw this is possible because they are in their best form.
Regarding the mentality, of course they have prepared for tonight, they can't understand if the two will be different but for me this match will be more waiting for the fans.
It's just that Bayern's advantage is playing at Allianz.