Casillas suddenly collapsed while training with FC Porto on Wednesday, and since the health scare Casillas has taken to Twitter to reassure his fans.
"Everything under control, a big fright but strong as ever," Casillas's tweet read.
"Huge thanks for all the messages and love."
The 37 year-old's heart attack prompted an outpouring of support from the football world, with some of the Spaniard's former team-mates and opponents alike sharing their well wishes on social media.
Vaya susto nos has dado Iker... Recúperate pronto amigo!! 💪🏻💪🏻 https://t.co/XZRjeYtB9J
— Andrés Iniesta (@andresiniesta8) May 1, 2019
Força Iker! Vais voltar mais forte 👊 🙏 pic.twitter.com/5X44DDAISI
— Cédric Soares (@OficialCedric) May 1, 2019
Mucha fuerza Iker. Estamos contigo, capitán. pic.twitter.com/wakvKds4hX
— Carlo Ancelotti (@MrAncelotti) May 1, 2019
Mucha fuerza @IkerCasillas que te recuperes tan pronto como posible 🙏🏼 pic.twitter.com/ipha91GvV5
— Maty Ryan (@MatyRyan) May 1, 2019
Mucha fuerza Iker, Recupérate pronto amigo. 🙏🏻🙏🏻 pic.twitter.com/4V7HMegZVq
— James Rodríguez (@jamesdrodriguez) May 1, 2019
Casillas won five LaLiga titles and three UEFA Champions Leagues during 16 decorated seasons with Real Madrid, while winning UEFA Euro 2008 and Euro 2012 along with the 2010 FIFA World Cup with Spain.
