The hostile reception Griezmann received could have huge consequences for Atlético Madrid. It is well known that the league take fan misconduct very seriously and not even 24 hours have passed for there to be news on the situation.
According to 'Deportes Cuatro', Antiviolence considers the insults against the Frenchman to be "very serious". You have to remember that ex Atlético Madrid player Griezmann was shouted at with chants of "Griezmann, die" by the fans.
"The intonation of chants that incite to violence or constitute manifest or contempt to the people who are involved in the match", the code of Antiviolence says in this regard.
Since LaLiga is going to report what happened, it will be up to the committee itself to decide whether or not to sanction the Atlético fans more or less severely.
The sanction could be from a 90,000 euro fine to a complete or partial stadium closure. They could close it for one match or several matches, although this is almost ruled out due to it not being an extremely serious issue.