Spain were incensed by the refereeing after they lost 5-3 to South Korea in a penalty shoot-out in their World Cup quarter-final on Saturday.
"I thought the referee would be fairer in a quarter-final match like this," said coach Jose Antonio Camacho, after the game finished 0-0 at the end of extra-time.
"We fought to the end and worked so hard but we went out because South Korea were luckier than us. I am just sorry we couldn't go any further."
Egyptian referee Gamal Ghandour disallowed two Spanish 'goals', including one by striker Fernando Morientes in extra-time, which television replays clearly showed should have stood.
Ghandour ruled the extra-time effort out when one of his linesmen flagged because he thought the ball had crossed the goalline before Joaquin crossed it for Morientes to head in at the far post.
Morientes said he had never seen refereeing like it before.
"It could have turned the game around and we are talking about the quarter-finals of a World Cup not a friendly match played just anywhere.
"Two goals disallowed -- that has never been seen."
Italy were also very angry about the refereeing after they were beaten by Korea with a golden goal in a second round match.
Goalkeeper Iker Casillas said: "We knew the referee would be like that. It is just what we expected.
"We hope there will be other opportunities to gain success, but now we will have to wait another four years and see if we qualify again.
"There are players who know that this was their last World Cup and everyone is hurt and very sad. We haven't lost a game and we are going home."
Casillas, hero of the second round penalty shoot-out win against Ireland, said he was deeply disappointed that he couldn't reproduce his performance this time.
"Last week I said that penalties are a lottery and today I just couldn't stop any of them."