Barcelona say they are ready to take legal action after the publication of the details of Lionel Messi's €555 million (£491m/$674m) contract.
Spanish newspaper El Mundo leaked documents revealing the terms of Messi's current deal at Camp Nou, which is due to expire at the end of June.
Their report states that the four-year agreement, which the Argentine signed in 2017, includes fixed incomes and bonus payments which amount to €138m (£112m/$167m) in annual earnings.
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Messi has already pocketed €510m (£452m/$619m), with a further €45m (£40m/$55m) set to come his way over the next six months, with El Mundo claiming that the 33-year-old is the best-paid athlete in the history of professional sport.