The Blaugrana have threatened legal action against El Mundo after the newspaper published details of the Argentine’s massive deal

Barcelona head coach Ronald Koeman has been left seething after details of Lionel Messi’s contract were leaked to the media – and has vowed to identify and punish whoever is responsible.

Barca find themselves in financial strife, but the figures shown on the six-time Ballon d’Or winner’s deal were astronomical.

El Mundo reported Messi’s current deal is worth a whopping €555 million (£491m/$674m), including €138m (£112m/$167m) in annual earnings.

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