This EL Classico can be very interesting because this time in this EL Classico Real Madrid don't have Benzema but they have players like Jude Bellingham who scored a goal in the last friendly match and on the other hand this game can be a hard test for Xavi and his players to find weakness and try to improve it.
As long as it's a friendly match, then it's not a problem, and maybe Barcelona will try to play relaxed because I'm sure they won't use the formation used during friendlies in the upcoming league matches. In this match, Xavi will keep an eye on this, and Weaknesses will still be improved because there is still time.