The Spanish league said Saturday it will ask police to act against the promoters of a social media campaign that the league says is aimed at promoting racist acts against Vinicius Junior at Sunday's derby between Real Madrid and Atletico Madrid.

The social media campaign is based on a hashtag encouraging Atletico fans to wear face masks, apparently to make it more difficult for authorities to identify individuals who participate in racist chants or insults.

Vinicius, who is Black, has been particularly targeted by racist slurs in away games for Real Madrid over recent seasons. One of the ugliest attacks against the Brazil forward came before a derby against Atletico in January 2023 when an effigy of him was hung from a bridge. Four people were arrested for the dummy hanging and are now facing criminal charges that could send them to prison for four years.

The league says it will ask police to find and detain the promoters of the face covering campaign. The league said the campaign is intended to "incite hate."

"The league energetically condemns these actions that encourage, promote or incite directly or indirectly hatred against a given person, in this case is Vinicius Junior, for motives of race," the league said in a statement.