Fans inside Valencia's Mestalla stadium were warned about racist behaviour, with their game against Real Madrid paused after abuse was allegedly directed at opposition forward Vinicius Junior.
The forward has been racially abused by fans in Spain this season, prompting strong criticism from others in the game. Back in February, Liverpool manager Jurgen Klopp said "nothing in the world" could justify such abuse, expressing his shock at a line of questioning from one reporter.
The match was eventually restarted after a short delay, with Vinicius sent off in second-half stoppage time as Madrid fell to a 1-0 defeat. After the fixture, Real Madrid boss Carlo Ancelotti strongly condemned the lack of action being taken.