Spain goalkeeper David de Gea has the support of his team-mates and will bounce back from his error against Portugal, according to Carlos Marchena.
De Gea fumbled a long-range Cristiano Ronaldo strike during Spain's thrilling 3-3 draw against Portugal in their World Cup opener on Friday.
The Manchester United shot-stopper has made errors in two of his nation's past three games in a worrying run of form.
But Marchena backed De Gea, saying the 27-year-old had the character to respond.
"As the master Luis Aragones said, De Gea has a broad back," the assistant coach said.
"These accidents can happen, but he has all the confidence of the group and the coach [Fernando Hierro].
"David is well and prepared for what is coming."
Spain are next in action with a clash against Group B leaders Iran on Wednesday.
