Lionel Messi has informed Barcelona he wants to "unilaterally" terminate his contract with the Spanish giants after a calamitous end to the season, a club source confirmed to agency on Tuesday. Lawyers for the Argentina star sent Barcelona a fax in which they announced Messi's desire to rescind his contract by triggering a release clause, sending shockwaves throughout the world of football. Barcelona have yet to officially react but are understood to believe the clause expired in June and that he remains under contract until the end of the 2021 season.