Sylvain Marveaux struck shortly after the hour as Stade Rennes maintained their unbeaten record in Ligue 1 with a 1-0 home win over St Etienne on Sunday.
Midfielder Marveaux, who missed much of last season through injury, fired home from a Moussa Sow cross on 62 minutes.
The win lifted Rennes up to sixth place with nine points from five matches and St Etienne fell to second bottom on three points.
Defender Cedric Hengbart netted a bicycle kick in the first half to give AJ Auxerre their first goal of the season in a 2-0 win over Nice, Romanian striker Daniel Niculae adding another after the break. The Burgundy side moved up to 17th in the 20-team league, sending Nice to 18th.
Paris St Germain missed the chance to join Girondins Bordeaux and Olympique Lyon at the top of the standings after they were beaten 2-0 by Monaco.
Late goals fromPark Chu-Young and Nene inflicted PSG's first defeat of the campaign.