If based on the schedule and the teams that will be faced before and after the El Classico match, it doesn't seem like it will be difficult to predict. Because it's clear where Barcelona have a more difficult opponent and as such, of course Barcelona have high pressure at this moment which will have an impact on their performance. With this pressure, personally it will not be difficult for me to make a choice and will be confident to have Real Madrid to win in this El Classico match, Barcelona was indeed seen as good at the beginning and also its current standings show that they can compete. But with the situation continuing to deteriorate I personally really doubt Barcelona's performance from now on and maybe, Barcelona will continue to get imperfect results because of the pressure that is going on in the team.
IMO, actually a serious problem faced by Barcelona is regarding the injured core players. otherwise, they will have no trouble playing La Liga matches including El Classico matches.
Before the match against Real Madrid, Barcelona was already under pressure from today's champions league match.
like it or not, Xavi must get full points in this match.
Win or lose against Inter later, Barcelona players will be tired and this can be an advantage for Los Blancos when they host Barcelona later in the El Classico party.
Yes, that's how it is, but I personally don't pay much attention to the basic factors that cause Barcelona's performance to decline, I only consider the results that are not optimal in Barcelona's last three matches. Even though they still got a win in La Liga but the victory was not as easy as imagined and also, the competition factor in the Champions League seems to make Xavi difficult to make the right rotation. Even for today's match against Inter I'm sure all the main players will continue to play, because this is the only way for Barcelona to win and to have a chance to qualify. Because if this result Barcelona loses by Inter then the chance to qualify will be lost, just like what happened with Juventus. With the main players being pressured, it will certainly have an unfavorable impact for the next match in La Liga and the Champions League, because after against Inter then Barcelona will play against Real Madrid, Villarreal, Bilbao, Bayern Munich and Valencia. It's a situation that Barcelona won't feel comfortable in, Barcelona need a second player who can play well if Barcelona want a good result too.