Monaco remained on course for Champions League qualification with a thumping 4-1 win at home to Toulouse in Ligue 1.
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.
Toulouse's battle to beat the Ligue 1 drop was boosted as they shocked Bordeaux 2-1 to register a first victory in five games.
PSG went top of Ligue 1 for the first time this season after title-rivals Lyon lost 2-1 at home to 10-man Nice on Saturday.
Ivory Coast winger Max-Alain Gradel scored for the fourth straight match as Saint-Etienne secured a 3-2 win at struggling Metz.
Lens gave their Ligue 1 survival hopes a shot in the arm as they ended a nine-game winless run by beating Toulouse.
Michy Batshuayi scored a first-half double as Marseille thrashed Toulouse 6-1 in Ligue 1 on Friday.
Jean-Daniel Akpa-Akpro netted a late equaliser as Toulouse battled back to record a 1-1 Ligue 1 draw against St Etienne.
Paris St Germain moved to the top of Ligue 1 as Adrien Rabiot's brace helped guide them to a 3-1 win over Toulouse.
Toulouse moved up to 16th in Ligue 1 as Aleksandar Pesic's late goal secured them a 2-1 home win over Rennes.
Caen continued their fine recent form with a 2-0 victory over Toulouse at the Stade Michel d'Ornano on Saturday.
PSG manager Laurent Blanc wants a repeat of the way his side played against Chelsea when they face Toulouse in Ligue 1.
Aleksandar Pesic's first-half strike saw Toulouse claim a 1-0 win over Reims on Saturday evening
PSG kept the pace up with leaders leaders Lyon after Zlatan Ibrahimovic's penalty gave them a 1-0 win at Saint Etienne.
Evian picked up their first Ligue 1 win in seven to edge away from the drop zone with a 1-0 victory over Toulouse.