The abuse tarnished PSG's 3-1 win over its bitter rival in what is known as “Le Classique.” French referees have the power to stop play if fans chant homophobic and racist slurs in stadiums.

The Ligue 1 match between Paris Saint-Germain and Lyon was briefly interrupted Sunday because of anti-gay chanting by PSG fans. Referee Benoît Bastien stopped play in the 53rd minute at the Parc ...