Messi, 33, is out of contract on June 30 and has yet to make an official decision about his Barcelona future.
But Blaugrana legend Andoni Zubizarreta believes the superstar forward has already made a decision on whether or not to sign a new deal.
He told Catalunya Radio: "The president [Joan Laporta] has already said that he would do everything possible for him to stay.
"From there on, if he decides to stay, then wonderful. If not, then we will have to keep playing.
"And if he does decide to leave - even though I know some people will propose that his shirt number is retired - someone will have to play with the number 10 in the Barca youth team. Life goes on."
Zubizarreta added: "In the process of us making our decisions, the things that happen to you have an influence.
"These are the factors that accumulate, but I think that Messi has, more or less, made up his mind.
"The cup final is one of those factors that help to confirm your decision. But I don't think it will be decisive.
"He is a veteran and we have all had days when we think about giving up football.
"Messi is a footballer in the traditional sense of the word, he is not a marketing product.
"He's old enough to know that sometimes you win and sometimes you lose, the thing is that he feels good at Barca."
Speculation continues to mount about the player's future ahead of the summer transfer window.
Will Messi leave the Camp Nou? Stay tuned.
Featured Image Credit: PA
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