Bernd Schuster is convinced Real Madrid have Barcelona rattled ahead of tonight's El Clasico. The former Real coach said: "There is a very important issue that often people do not like to hear, especially people of Barcelona.
"Although we are frightened by the flu that comes from Mexico, another virus is floating around called Madriditis.
"Madrid has never had these problems but, instead, Barcelona suffer badly. This bit of doubt of what can happen is in the Barca psyche. After so many victories and good football, Barca know that Real are still capable of beating them for the title."