Paulo Henrique Ganso is pushing for an immediate release from his Sevilla contract.
The Brazil attacker, 28, has managed 11 appearances this season.
But Guiseppe Dioguardi told Estadio Deportivo: "I have proposed immediate termination. I said that the numbers of Paulo Henrique, besides being a great professional, show that the player has clear conditions to be a protagonist in Spain, only minutes are missing.
"They, having this treatment towards the player, give me the impression that they think differently from me and the fans. For that reason I have asked for the release.
"It's a shame."