Sevilla have shelled out over 20m on coaches this season.
As they battle against relegation, Sevilla hired Jose Luis Mendilibar this week after sacking Jorge Sampaoli.
This was Sampaoli's second spell in charge of Sevilla, having arrived after Julen Lopetegui was pushed out before his move to Wolves.
Estadio Deportivo says the three changes have cost the Sevilla board over 20m.
Mendilibar, meanwhile, has signed to the end of the season.