The 37-year-old Porto goalkeeper took to Twitter to confirm that he was in a stable condition, posting: "Everything under control, a big fright but strong as ever."
Todo controlado por aquí, un susto grande pero con las fuerzas intactas. Muchísimas gracias a todos por los mensajes y el cariño 😃💪🏼 pic.twitter.com/i3TXsELUGD— Iker Casillas (@IkerCasillas) May 1, 2019
Casillas's wife Sara Carbonero said: "Iker is calm, it's very good.
"We have to stay a few more days in the hospital, maybe he will be discharged on Monday and we can go home."