Barcelona director Pancho Schroder has admitted the enormous release clause written into Lionel Messi's latest contract does not guarantee the superstar will stay at Camp Nou.
Neymar buy-out changes everything
Barca stunningly lost prized asset Neymar to Paris Saint-Germain in August after the Ligue 1 side smashed the world transfer record by meeting the Brazil international's €222million buyout fee.
Responding to that seismic shock, the Catalan giants opted for an equivalent figure of €700m when Messi finally signed his new deal in November.
Nevertheless, corporate director Schroder feels the club remains vulnerable to approaches for the 30-year-old Argentina international.
"We set up a clause which we think is enough to have Messi retire at FC Barcelona," he told Sky Sports.
"But, having said that, we thought a year ago that the clause for Neymar was also good enough to retain the player, and that proved last summer not to be the case.
"Looking at the future, I think, is difficult, but I don't have a crystal ball and these days things are getting a little bit crazy."