Sources in Porto suggest that Casillas will not be able to play again Portugal Suffered heart attack during Porto training on Wednesday

There are some suggestions that Iker Casillas' incredible career has come to an end.

The former Real Madrid and Spain captain suffered a heart attack during Porto training on Wednesday and is now in a stable condition in hospital.

With the cardiac problem resolved, the goalkeeper can turn his attention to recovering with the idea of playing football again.

However, sources in Porto are saying that Casillas may not return to action and that his playing days are finished.

Porto are ensuring that the Spaniard can live a normal life after the incident, rather than prioritising his return to the team.

Casillas recently signed a contract extension at the Portuguese club, keeping him at the Estadio do Dragao until the summer of 2020 with an option of a further year.

The overwhelming response to the news of his heart attack shows just how much he has contributed to the game.

The goalkeeper captained Spain to a World Cup triumph and two European Championship wins as well as winning three Champions League titles with Los Blancos.