Great teams are always a struggle of tactics and a good execution of moments. It was with the implementation of chances that Barcelona had problems, because there were periods when Barca dominated and there was a feeling that a little more and there would be a goal, but Neuer worked perfectly in this match and saved Bayern several times from a goal. I don't know if there is Xavi's mistake here, Bayern are really stronger at the moment.
Of course, for now Bayern Munich is still showing that they can't be beaten by Barcelona. Even if you calculate the total of all goals from the meeting between Barcelona and Bayern Munich until yesterday's meeting, namely Bayern Munich 16: 2 Barcelona is still so far from what was expected that it will overshadow Barcelona when it will meet again. Therefore, it will be quite difficult for Barcelona to qualify easily for the Champions League group stage. For the next meeting at home to Barcelona, Xavi must be able to precisely change from long-range play to close-range play. Because that's what I think can pressure the Bayern Munich players not to move freely. See when they play with a club whose attacking ability is below Bayern Munich, it always ends in a draw, right?