Spanish Football Federation (RFEF) chief Luis Rubiales, 45, kissed Hermoso as he handed the Spanish team their gold medals after they beat England 1-0 in the final on Sunday in Sydney, provoking outrage in Spain.
He kissed other players on the cheek or embraced them.
“What we saw was an unacceptable gesture,” Sanchez told a news conference when asked about the outcry over the unsolicited kiss.
“I also think the apologies given by Mr Rubiales are insufficient. And I even think that they are inappropriate, and that he must go further,” added Sanchez, a Socialist politician whose government has pushed through tougher laws on sexual consent and harassment.
The RFEF announced it would call an extraordinary general assembly on Friday “as a matter of urgency” to address the incident.
As the controversy over the kiss grew, Rubiales apologised in a video posted on social media.
“It…