Radamel Falcao scored on his Ligue 1 debut as Monaco left it late to record a 2-0 win in Bordeaux.
Elsewhere, there were wins for seven-time champions Lyon, Nantes, Rennes, Valenciennes and Lille.
Paris St-Germain were held to a 1-1 draw at Montpellier on Friday.
Backed by Russian billionaire Dmitry Rybolovlev, Monaco's ex-Chelsea manager Claudio Ranieri was able to select summer signings including James Rodriguez, Ricardo Carvalho, Eric Abidal and Jeremy Toulalan at Stade Chaban-Delmas.
Despite the money lavished on them, the principality side seemed to be headed towards a draw before Emmanuel Riviere and Falcao scrambled home in the final stages.