Barcelona legend Johan Cruyff has fired a warning at Real Madrid after their drab 0-0 draw with Real Mallorca.
Cruyff believes Real risk being left behind if they don't start winning.
He said: "Barcelona produced an excellent debut to the new season in Santander. Real Madrid will have to start rowing in order to get the club moving forward.
"Barcelona will be able to capitalise on the errors of their rivals."
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