Real Madrid's lengthy injury list has been made longer after Gabriel Heinze picked up a leg muscle injury.
The Argentina defender picked up the problem during Tuesday's Champions League victory over BATE Borisov.
Initial reports suggest Heinze could be sidelined for up to four weeks, which puts his participation in the derby showdown with Barcelona in mid-December in doubt.
Under-fire Real coach Bernd Schuster is already without a host of star names due to injury.
Ruud van Nistelrooy, Gonzalo Higuain, Pepe, Fabio Cannavaro, Mahamadou Diarra, Arjen Robben, Christoph Metzelder and Ruben de la Red are all currently in the Santiago Bernabeu treatment room.