Radamel Falcao was on target as Monaco beat Nantes 1-0 to claim their first win of the season.
Monaco, last season's Ligue 1 runners-up, lost 2-1 at home to Lorient in their opener and were then thrashed 4-1 by Bordeaux, but Falcao headed home just before the break to secure their first points of the campaign.
Lens picked up their first win of the new season with a 1-0 success at Lyon.
Lalaina Nomenjanahary scored the only goal for Antoine Kombouare's side 11 minutes in and it was comfortable for them after that, short of a late flourish from Lyon which could not bring about an equaliser.
An away success at Lyon - and a deserved one at that - is a real scalp for Lens and, after defeats to Guingamp and Nantes, should set them up for the weeks ahead.
St Etienne missed the chance to join Bordeaux at the top of the early Ligue 1 standings as a missed penalty proved costly in a goalless draw with Rennes.
Moments after Rennes' Pedro Henrique struck a post, St Etienne looked poised to take full advantage when Mevlut Erding won a 40th minute penalty, but he saw his shot saved by Benoit Costil.
St Etienne continued to push in the second half but created only a handful of chances and Rennes held out for a point.