Marseille extends unbeaten run in France
M’Baye Niang put Rennes in front in the 19th minute when his shot took a deflection off Hiroki Sakai.
Duje Caleta-Car leveled for Marseille seven minutes into the second half, heading in Bouna Sarr’s corner for the Croat’s first goal in the top tier.
Marseille goalkeeper Steve Mandanda made back-to-back saves to deny substitute Adrien Hunou with five minutes left to preserve the point.
The draw left Marseille in fifth place after eight rounds — five points behind leader Paris Saint-Germain. Rennes is eighth.
Also, 10-man Saint Etienne won 1-0 at Nimes with a goal from defender Mathieu Debuchy in the 68th.
Saint Etienne, which played the last 16 minutes without Romain Hamouma after he was sent off with two bookings, is in second-to-last place.