Reims failed to return to winning ways as they were held to a goalless draw by Ligue 1 bottom side Metz.
Metz's bid to stay in Ligue 1 took another blow after they suffered a 2-0 defeat at home to Guingamp.
Bastia extended their unbeaten run to 12 games in all competitions with a 2-0 victory over 10-man Metz on Saturday.
Metz stay bottom of Ligue 1 after snowy conditions rendered their goalless draw with Nice virtually unplayable at times.
PSG kept the pace up with leaders leaders Lyon after Zlatan Ibrahimovic's penalty gave them a 1-0 win at Saint Etienne.
Lyon moved four points clear at the top of Ligue 1 with a 2-0 victory over lowly Metz at Stade de Gerland on Sunday.
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