Spain will look to ease pressure on them with their first win of the ongoing FIFA World Cup, while Iran will aim to register their second consecutive triumph in the group B clash.
Spain tied 3-3 with Portugal on Friday in their first international match under newly-minted head coach Fernando Hierro, who took the job just two days before the World Cup after Julen Lopetegui was sacked for announcing he would lead Real Madrid next season.
Portugal lead the group with four points, with the win over Morocco earlier today. Iran is on three points after beating Morocco 1-0 on Friday, thanks to an own goal from Aziz Bouhaddouz.