Barcelona striker Samuel Eto'o was the victim of alleged racist abuse in his side's 2-1 win over Getafe in Madrid.
A small group of home supporters appeared to direct monkey chants at the African player of the year every time he touched the ball.
Eto'o refused to comment but Getafe striker Gica Craioveanu said: "I don't agree with this behaviour. I wouldn't have liked to have been in his shoes."
England's black players were subjected to verbal abuse in a game with Spain.
Fifa has launched an investigation into those recent events, while Uefa is looking into apparent abuse of Bayer Leverkusen's players in a Champions League game against Real Madrid.
Both incidents occurred in Real's Bernabeu stadium.