Osasuna may face punishment for a chant about Mason Greenwood that was heard in the stadium on Sunday.
Greenwood made his Getafe debut following his move from Manchester United on loan on transfer deadline day.
It was the 21-year-old's first football match since January 2022.
He was suspended by the Red Devils following allegations made on social media.
Greenwood was subsequently charged with attempted rape, assault and controlling and coercive behaviour.
Those charges were later dropped by the Crown Prosecution Service in February 2023.
United concluded their internal investigation in August and the decision was made for him to leave the club.
He arrived at Getafe and made his LaLiga debut as a substitute in their 3-2 win over Osasuna on Sunday.
When he entered the pitch, there were chants of 'Mason Greenwood, die' from the Osasuna fans.
The Athletic report that these chants were heard by match officials and a legal and disciplinary process now to follow.
Osasuna coach Jogoba Arrasate condemned the chants from his supporters, but also pointed to abuse that was directed from the home fans.
“The chants of ‘F*** Osasuna’ were very bad and the chants against Greenwood were very bad, too,” he said. “He is a player who, in the end, the justice system had its say.
“He is a very good player. But if we talk about chants, we should talk about all the chants, not just some.”
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