Alejandro Moreno reacts to Real Madrid's 3-1 win over Pachuca at the Club World Cup. (2:36)Antonio Rüdiger alleged that he was racially abused in the final moments of Real Madrid's 3-1 win over Pachuca in the Club World Cup on Sunday, and manager Xabi Alonso said that FIFA has launched an investigation. Asked if Rüdiger had been the victim of racism during the game, Alonso told a news conference: "That's what Rüdiger said, and we believe him. Referee Ramon Abatti signaled the activation of the anti-racism protocol after speaking with Antonio Rüdiger at the end of Real Madrid's win over Pachuca. Rüdiger, 32, has been the target of racist abuse several times when playing for Chelsea, AS Roma and Madrid, both on the pitch and online.