"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."
Korea's last opponents Italy, who expressed their annoyance with a series of ruled-out goals during the tournament, might disagree.
And Spain goalkeeper Iker Casillas said that referees had been favouring the Koreans throughout the tournament.
"We'd already seen this when South Korea played against the United States, Portugal and Italy," he said.
Defeat was particularly hard for Casillas to take after he pulled off two heroic shootout saves to put his country into the last eight at the expense of the Republic of Ireland.
"Penalties are a lottery. We won last week and today we lost.
"We've been dumped out without losing a match. Now we must wait four years assuming we qualify for Germany 2006."