Barcelona players refused to speak to the media after their 0-0 draw with Malaga.
Three players spoke to television companies with game rights, Pique, Sergi Roberto and Busquets, but nobody attended the written and radio media at Camp Nou, says Sport.
The LFP obliges all first team clubs to send their coach and at least one player to speak to the media and if that does not happen there is supposed to be a fine.
Barcelona could tell the LFP that Paco Alcacer, Lucas Digne and Denis Suarez passed through the mixed zone, but none of them stopped to speak to the journalists.