During a Ligue 1 match on March 1, 2025, Paris Saint-Germain (PSG) supporters from the Auteuil stand engaged in a chant likening fans of rival club Olympique de Marseille to 'rats.' This incident occurred following PSG's 4-1 victory against Lille and just two weeks prior to an anticipated match against Marseille.

Following the chant, the stadium announcer issued a statement in adherence to guidelines set forth by the Ligue de Football Professionnel (LFP).

This chorus by PSG ultras is reminiscent of an earlier incident that took place on January 26, 2025, when supporters of OGC Nice displayed a banner using similar derogatory language towards Marseille fans.

The LFP's disciplinary commission responded to the Nice incident by sanctioning a three-match closure of the popular south stand at the Allianz Riviera in Nice on February 12, 2025.

This chain of events highlights ongoing tensions between football clubs in the French league, particularly between PSG and Marseille, which is regarded as one of France's most intense rivalries.

The use of inflammatory language and imagery by fan groups has drawn attention to issues of sportsmanship and the responsibilities of clubs in managing their supporters.