Paris Saint-Germain's hardcore supporters will be in the spotlight as much as the club's players on Tuesday night during the Champions League clash against PSV Eindhoven after French league bosses launched an investigation into homophobic chanting during PSg's Ligue 1 game on Saturday with Strasbourg. PSG won the encounter at the Parc des Princes 4-2 and a similar result at the same venue against the Dutch champions would be a welcome boost for Luis Enrique's side in the competition following a 2-0 defeat at Arsenal in their second game.