A man who coached the goalkeeper at Porto is yet to select him at international level but insists there are opportunities to add to his 167-cap haul
Spain coach Julen Lopetegui has not "closed the door" on Iker Casillas' international career.
Casillas - Spain's record cap holder with 167 - has not been selected since Lopetegui succeeded Vicente del Bosque after Euro 2016.
The 35-year-old Porto stopper is still hopeful of featuring at the 2018 World Cup in Russia and his recent club form has been encouraging.
Lopetegui coached Casillas at Estadio do Dragao prior to his Spain appointment and says the door remains open for the former Real Madrid man.