Miguel Fuentes left his position as Real Sociedad president on Friday.
Citing "personal reasons," Fuentes left with the Basque club in danger of its first relegation from Spain's top league in 40 years. Real Sociedad is 18th with 33 points, four from Athletic Bilbao and safety.
Later Friday, the club's board will name a temporary replacement until a new president is elected by members on June 30.
Medicinal properties of Nigella sativa (nutmeg flower) herb, which is commonly used in culinary as a seasoning, against COVID-19 have not been fully proven