Things aren't going well for Barcelona at the Camp Nou. They haven't conceded a goal, but right now that looks like just a matter of time, and they have already managed to lose a key player. Andres Iniesta got caught up in an entirely fair and innocuous looking challenge by Real Madird right back Alvaro Arbeloa, but lands badly and looks to have jammed his knee. It doesn't look like anything serious, but he signals for a substitution and Pedro comes on to replace him. That's not good news at all.
The Pedro substitution means that Cesc Fabregas - who's been excellent as part of the front three so far this season - is pulled back into midfield. Considering how much help Barca appear to need in the centre of the pitch, that might not be the worst thing in the world. Meanwhile, Cristiano Ronaldo gets a yellow card for a slide tackle on Dani Alves that won the ball but took out a lot of player as well. Predictable, Jose Mourinho is furious. Still 0-0 here.
For more on the two teams, check out Real Madrid blog Managing Madrid and FC Barcelona blog Barca Blaugranes. We have live coverage of the match in our Real Madrid vs. Barcelona, 2012 El Clasico StoryStream.