An initial investigation by the RFEF's competition committee has decided there is evidence to suggest that Guardiola brought the game into disrepute, and have rejected a defence case presented by the club on Monday.
Inquiry leader Rafael Alonso Martinez has one month to decide if an offence has been committed and if so what the punishment should be.
A few days later, Guardiola said: "I have seen the footage and I am not very proud. Seeing it I can understand the sending off and I don't like seeing myself like that.
"But when someone lies you have to appeal. They (the officials) lied in the match report and put things in there that I did not say."
He quoted Guardiola as saying: "Your decisions are the wrong way around" and "You don't understand anything."
