MALAGA have enraged Barcelona by suggesting they could let Real Madrid pip the Catalans to the league title.
While Barcelona currently top the division, Real Madrid have a game in hand and are level on points in a delicately poised title race.
The Costa del Sol club host Madrid on the final day in what could be a decisive fixture for the title.
Comments from coach Michel and a tweet from owner Sheikh Abdullah Al-Thani have suggested Malaga would prefer Real Madrid to win and not Barcelona.
Michel, who played for the Madrid side for 14 years, claimed he was still a fan of the club, but it was owner Al-Thani who made the most controversial comments.
He tweeted: “The human waste of Catalunya will never smell [the glory] of La Liga.”
This prompted a furious response from FC Barcelona, who have now released a statement expressing “rejection and indignation”.
They added: “The club will formally complain to the Anti-Violence Comittee of the Superior Sports Council, and will transfer the matter to the Competition Committee of the Royal Spanish Football Federation, and the Department of Integrity of La Liga.”