Manchester United midfielder Casemiro can see Vinicius Jr leaving Real Madrid.
Vinicius Jr has been subject of abuse at away stadiums in Spain this season.
Casemiro told TNT Sports: "It bothers us that there are still people like that. It's not the first time Vinicius has complained, he complains a lot. I think LaLiga has to take action, because they can't lose a player like that."
Casemiro left Real last summer for United.
He added, "I'm glad he's at Real Madrid. But I wouldn't be surprised if he wanted to leave, if he wanted to dedicate himself to other things,"