Marca report on their front page that Florentino Pérez will sack Carlo Ancelotti if Real Madrid collapse at the Camp Nou. Real Madrid's President wants the team's slump to end right now and will not put up with another embarrassing performance by Los Blancos after the 3-4 loss against Schalke.
If this does indeed happen, there aren't many options to replace Ancelotti as interim coach until the end of the season. Florentino Pérez would not put Zinedine Zidane in that situation, according to reports, and whether Fernando Hierro would be willing to take care of this team or not remains to be seen.
A loss at the Camp Nou would put Real Madrid 4 points behind Messi and co. in La Liga's table when Ancelotti's men were having that same advantage barely two weeks ago. There's still a long way to go, but Pérez has decided to end this situation if Real Madrid can't get a good job done in Barcelona.