Nyon, Switzerland: UEFA has charged Barcelona over fans showing an "illicit banner" at Camp Nou during a Champions League win against Manchester City.
UEFA announced the incident Friday but did not give details. Barcelona won 1-0 on Wednesday to advance from the round of 16 on a 3-1 aggregate score.
UEFA says its disciplinary panel will judge the case on May 21.
The two-month wait for a hearing suggests the incident is not serious.
UEFA typically fast tracks cases so it can apply sanctions at a team's next home match.
Barcelona hosts Paris Saint-German in the second leg of the quarterfinals on April 21.