Real Madrid has a strong defence.
Casillas is arguably the best keeper in Spain right now.
Ramos is outstanding in his reverted role as right back, and Pepe was excellent during El Clasico. Left back, Heh, we have plenty of cover in that area.. Torres, Drenthe, Marcelo all equally good going forward, but none better than Heinze defensively. Cannavaro has the most highest profile of all the defenders, but he is inconsistent.
I liked Real Madrid better when they were playing wonderful attacking football.