MARSEILLE, March 14 — Amine Gouiri came off the bench to smash home the only goal yesterday as Marseille consolidated their grip on third in Ligue 1 with a 1-0 home victory over relegation-haunted Auxerre.

While Paris Saint-Germain and Lens have opened up a gap at the top, the five teams below them, chasing the last automatic Champions League berth, started the weekend separated by six points.