Messi was forced off with a thigh injury and is expected to be out for a month - so missing the match at the Nou Camp against Real.

"It is bad news and a pain for him and the team," said Barca coach Frank Rijkaard. "I hope that he recovers as quickly as possible. We will have to play another one in his place (against Real Madrid)."

Barca sports chief Txiki Begiristain was crystal clear: "It is the worst thing that could happen to Barcelona."