Atletico Madrid fans targeted Vinicius Junior with offensive chants before Sunday's clash against rivals Real Madrid and threw objects on to the pitch as he celebrated Rodrygo's opening goal.
Much of the pre-match focus was on Vinicius after agent Pedro Bravo made a racially insensitive comment on football TV show El Chiringuito.
Bravo said Vinicius should "stop playing the monkey" in reference to the Brazil international's tendency to dance when celebrating a goal.
Many of the sport's biggest names rallied behind Vinicius, with Arsenal striker Gabriel Jesus even dedicating a similar celebration to his international team-mate earlier on Sunday.
Despite so many messages of support, a group of Atletico fans disgraced themselves as they queued to enter the Civitas Metropolitano, singing offensive chants that Vinicius was the subject of.
Vinicius and Rodrygo then celebrated with a dance as the latter opened the scoring, and several objects were subsequently thrown in their direction from the stands.