Toulouse missed the chance to pull further away from the relegation zone as Nantes earned a late 1-1 draw.
Lorient dropped into the Ligue 1 relegation zone as Toulouse won a classic six-pointer 1-0 on Saturday night.
Franck Tabanou scored the winner as Saint-Etienne beat Nantes 1-0 on Sunday, while Lille and Rennes also claimed victories.
Toulouse boosted their bid to beat the Ligue 1 drop by claiming a 1-0 victory over Montpellier.
Lyon moved back to the top of Ligue 1 for 24 hours at least after claiming a comfortable 3-1 victory at Guingamp.
Metz gave themselves at least some hope of staying in Ligue 1 with a 3-2 victory over Toulouse.
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