Vice-president of the Spanish Professional League Javier Tebas has claimed games in Spain have been fixed.
Tebas' claims come just weeks after an Europol investigation cited 680 fixed matches across the world, none of which took place in Spain.
However, Tebas said Thursday he believes the problems in Spain are more closely linked to ensuring results towards the end of the season than with the gambling syndicates highlighted by the Europol investigation.
"Yes, there have been games fixed in Spain and you know it too," he told the Cadena Cope radio station.
"We cannot deny the fact it is very serious. It is a minority, but very serious.
"In Spain the fix is not linked to betting, but to the standings at the end of the season. It could have been just two or three games, but they are important."
Tebas even went as far to say he had spoken to a player who had been approached about fixing games.
"Players or directors will tell you, but they don't want to go to court. A player in the First Division has told me and we don't have to deny that it exists.
"An important informant told me that a teammate of his had told him there had been fixed matches.
"Whoever we catch fixing games will go to jail."
Tebas also addressed the perilous financial position of a number of Spanish clubs and believes Deportivo la Coruna could go out of business if they get relegated this season.
The Galicians are currently bottom of the table, eight points from safety, and entered administration in January.
"In a few months or a year a club could disappear. I see two clubs in a very difficult situation.
"Deportivo could be a candidate in two or three years if they don't fix their debt. A debt in the First Division you can maintain but if you go down it is more difficult."