Spain keeper Iker Casillas has admitted that he is at a loss to explain his side's exit from the World Cup at the group stage.
The 2010 winners crashed out of the tournament following their 2-0 defeat to Chile after previously being hammered by the Netherlands in their opening game.
Casillas told reporters: "It is hard to explain what happened. I ask for forgiveness. We did our best and did not want to disappoint people.
"There is no option but to look into the future, think about the next game and do our best. Holland and Chile were better than Spain."
Spain face Australia in their final game in the World Cup next week.
