Earlier on Wednesday, the Royal Spanish Football Federation (RFEF) announced that Hierro would replace Julen Lopetegui as Spain head coach after Lopetegui had been sacked for negotiating with Real Madrid about becoming their new head coach without giving the federation any prior notification.

The World Cup gets underway on Thursday with hosts Russia playing Saudi Arabia in the opening match. The tournament will come to an end on July 15, with the final being played in Moscow.  

Spain have been drawn in Group B and will play reigning European champions Portugal in Sochi on June 15, Iran in Kazan on June 20 and Morocco in Kaliningrad on June 25.