Atletico Madrid have condemned the racist abuse Real Madrid forward Vinicius Junior received prior to and during the Derbi Madrileno on Sunday.
The Brazil international was subjected to racist chanting and monkey noises from a large section of home fans both before the match outside the Wanda Metropolitano Stadium and inside the ground during the game.
La Liga have already confirmed an investigation is underway, while Atletico Madrid released a statement on Tuesday denouncing supporters who abused Vinicius.
"Atletico de Madrid roundly condemns the inadmissible chants that a minority of fans made outside the stadium before the derby was held. Racism is one of the biggest scourges in our society and unfortunately the world of football and clubs are not free from its presence.
"Our club has always been characterised by being an open and inclusive space for fans of different nationalities, cultures, races and social classes and a few cannot tarnish the image of thousands and thousands of athletes who support their team with passion and with respect for the rival," the statement read.