Casillas, the Real Madrid and Spain legend, has decided to call time on his career despite recently signing a new contract with the Portuguese club.
He has been offered a position in Porto’s backroom staff by Pinto da Costa, the club’s chairman, with the role understood to be some kind of ‘international ambassador’ to take advantage of his fame and media influence.
ABC claim Casillas will announce his retirement ‘shortly’.
The 37-year-old suffered an acute myocardial infarction earlier this month while at Porto’s training centre, with the glovesman rushed to hospital.
He quickly entered a stable condition, and admitted after leaving hospital he may return to football.