The bad news for Xavi and his players before the game they have with Real Madrid is about their player, Raphinha.
El Clasico is the most important game in La Liga and it seems Barcelona won't play in this match with full power and their player Raphinha is injured and he can't play for his team for a month.
Well, he'll be resting for a few weeks now due to a hamstring problem and it's rumored that it's also likely that he'll be out until the match against Napoli in the Champions League Round of 16.
This will certainly be a hassle for Barcelona as they will only be able to utilize Lamine Yamal on the right flank even though this is good for Yamal but not for the performance as this could be very troubling for them due to the lack of attacking power especially on the wings.
Not to mention that if you only proportion Yamal too often this will also make him a little depressed and this must be minimized because with Yamal's current age and the burden given if it is too big then it could actually interfere with his own performance.
Xavi will have to find alternatives and new formations now in what could be a very busy schedule later on and it's the Madrid game that's worrying because apart from the trophy race it's also a prestige match.