Germany head coach Joachim Low said on Wednesday that he was "shocked" by the decision to fire Julen Lopetegui as Spain head coach just a day before the start of the FIFA World Cup.
"It was a surprise for me. This decision was a very serious shock, it can lead to disenchantment within the [Spanish] team," said Low.
"As far as I remember, Hierro [the newly appointed Spain head coach] has coaching experience, he was an assistant coach at Real Madrid.
"We should remember that Spain is a team that has its own philosophy, there are players of the strongest clubs there. Spain have been playing at a very high level for many years.
"I think Spanish footballers are unlikely to lose their class and style because of what has happened."
Earlier on Wednesday, Royal Spanish Football Federation (RFEF) President Luis Rubiales announced at a press conference that Lopetegui had been sacked as Spain head coach after agreeing to join Real Madrid after the World Cup, but without giving the RFEF any prior notification.
Spain's sporting director Fernando Hierro has been appointed the national team's new head coach.
Spain will face Portugal, Morocco and Iran in Group B.