UEFA has provisionally suspended Benfica midfielder Gianluca Prestianni.
The suspension comes after allegations of racist abuse against Vinicius Junior.
The incident is said to have occurred during a Champions League play-off first leg.
European football's governing body confirmed the decision on Monday.
The disciplinary body decided to provisionally suspend Mr. Gianluca Prestianni.
This means he cannot play in this week's Champions League second leg match.
The allegations relate to discriminatory behavior.
UEFA is investigating the claims of racism.