Paris Saint-Germain were held to a 1-1 draw by Lorient, missing the chance to extend their lead at the top of the table.
The French champions had the opportunity to move four points clear of second-place Lens, but a lacklustre performance means the gap is now just two points.
Nuno Mendes gave PSG the lead, but Igor Silva brought the hosts level just a few minutes later.
Marseille could leapfrog both Lens and PSG with victory over Angers later today.
Author's summary: PSG held to a 1-1 draw by Lorient.