Spain boss Vicente del Bosque will reportedly name his first post-World Cup squad on Friday.
La Roja entered this summer's tournament in Brazil as the reigning European and world champions, but failed to make it out of a group that contained Chile and Netherlands.
Their first official match since the World Cup will be a friendly against France on September 4, before opening their Euro 2016 qualifying campaign against Macedonia on September 8.
A host of youngsters are expected to be given the chance to impress.