Spain player Jenni Hermoso has filed a criminal complaint over suspended football chief Luis Rubiales's kiss on her lips at the Women's World Cup final, a source at Spain's public prosecutors office said Wednesday.

The complaint, which was filed on Tuesday, is key for a preliminary investigation, which prosecutors at Spain's top criminal court have opened for the alleged crime of "sexual assault", to move forward.

The prosecutor's office of the National Court will formally present its complaint against Rubiales "as soon as possible", the source said.

Spanish football federation (RFEF) president Rubiales sparked a worldwide backlash after forcibly kissing Hermoso during the medal ceremony following Spain's triumph in Sydney on August 20.

Hermoso, 33, later said the unwanted kiss had left her feeling "vulnerable and like the victim of an assault", with a statement on social media describing it as "an impulsive, macho act, out of place and with no type of consent on my part".

Rubiales insists the kiss was consensual.

The National Court said last week it was opening the preliminary probe in light of the "unequivocal nature" of Hermoso's statements, stating it was necessary "to determine their legal significance".

World football governing body FIFA provisionally suspended Rubiales for 90 days after he refused to resign from his post.

Some 81 players went on strike from the women's side in protest after the 46-year-old's fierce defensive speech following the incident, in which he railed against "false feminism". They said they would not return until the RFEF's leadership was changed.

The federation sacked controversial Spain women's coach Jorge Vilda on Tuesday in the wake of the scandal.

Spain's top sports court (TAD) also agreed to investigate Rubiales after the government lodged a complaint.

Rubiales also came under fire for grabbing his crotch with both hands as he celebrated Spain's win while standing next to Spain's Queen Letizia and her 16-year-old daughter, Princess Sofia. He later apologised.

However the suspended chief said he would continue to defend himself "to prove the truth" over his kiss with Hermoso.

In a statement last week Rubiales reiterated that the kiss was "a mutual and consensual act" with "overflowing jubilation on both sides".

Apology

The RFEF apologised for the "totally unacceptable behaviour" of Rubiales on Tuesday and fired Vilda as part of an overhaul. The apology came more than two weeks after the incident.

In a letter signed by its interim president Pedro Rocha, the RFEF offered its "most sincere apologies... for the totally unacceptable behaviour of its highest institutional representative during the final of the FIFA Women's World Cup 2023 and in the moments that followed".

Vilda's former assistant Montserrat Tome is the new coach -- it is the first time a woman has led the team. The next matches are in Nations League qualifying against Sweden and Switzerland on September 22 and 26 respectively.

Meanwhile men's team defender Dani Carvajal came under fire for comments he made Tuesday night on Spanish radio, in which he said he did not want to position himself on the issue "without knowing what really happened".

Carvajal had said "there are people who must decide if there is a culprit or a victim" and noted Hermoso had not filed a complaint at the time. He clarified his words in a news conference Wednesday.

"In no moment did I say that Jenni was not the victim, I just said that the presumption of innocence (until proven otherwise) has to be maintained," said Real Madrid right-back Carvajal.

"If she's having a tough time we have to show solidarity with her, that's clear, like any person -- I don't think the president is having a good time either.

"I am not here to judge or label anyone."