The Spanish Football Federation is considering whether it has grounds to sack Spain Women’s World Cup-winning head coach Jorge Vilda, according to reports.

Vilda is still in the post after most of his coaching staff resigned in protest against federation (RFEF) president Luis Rubiales, who has refused to quit for kissing Spain player Jenni Hermoso after their World Cup final win.

All of Spain’s 23 World Cup winners, plus another 58 players, have said they will not represent their country until Rubiales has left his post.

Rubiales, 46, was provisionally suspended by FIFA on Saturday pending an investigation into his conduct in Sydney after Spain’s win against England on August 20.

He was applauded by Vilda after repeatedly insisting that he would not quit at the RFEF’s extraordinary general meeting last Friday and the federation is exploring its options over whether they can sack the head coach.

On Monday, the RFEF regional heads became the latest group to call for Rubiales’ resignation, while members of the Spanish government have added their voices to the those demanding he step aside.

Earlier on Monday, Rubiales’ mother announced she was going on hunger strike over the “inhuman” treatment of her son, according to reports in Spain.

The president grabbed his crotch in the stadium’s VIP area in celebration of Spain’s win over England, when he was stood metres away from Spain’s Queen Letizia and her teenage daughter.

FIFA has suspended Rubiales for an initial period of 90 days. He and the RFEF have also been ordered not to contact Hermoso either directly or through intermediaries.

Hermoso has accused the RFEF of a “manipulative, hostile and controlling culture” and said Rubiales’ kiss was “an impulse-driven, sexist, out-of-place act without any consent on my part”.