Bordeaux beaten by Saint-Etienne
The 2009 champions, who limped home seventh last term and lost coach Jean Tigana, went behind to a Michael Ciani own goal and were 2-0 down when Pierre Aubameyang scored on the half hour.
Jussie's second-half spot-kick failed to inspire a comeback for the hosts, who sold France midfielder Alou Diarra to Olympique Marseille in the close season.
Saint-Etienne also lost arguably their best player, Dimitri Payet, to champions Lille in the summer but shrugged off the disappointment with a confident display.
Promoted Dijon earlier failed to cut the mustard in their first Ligue 1 game of the season when they were thrashed 5-1 at home by Stades Rennes.
In Saturday's opening matches, Olympique Lyon won 3-1 at Nice but other big guns Lille and Marseille could only draw while big-spending Paris Saint-Germain lost 1-0 at home to Lorient.