Montpellier missed the chance to put Monaco under pressure as they were held to a goalless draw at lowly Lorient.
Dimitar Berbatov scored the only goal of the game as AS Monaco won their fourth match in a row at Lille.
Guingamp moved up to 12th in the Ligue 1 standings courtesy of a 3-2 triumph over Lorient at the Stade du Roudourou.
Alexandre Lacazette was on target again as Lyon strengthened their position at the top of Ligue 1 with victory at Lens.
Lorient ended a four-match losing run as Raphael Guerreiro's second-half strike gave them a 1-0 win over Lille.
Paris Saint-Germain blew a two-goal lead to lose 4-2 at relegation-threatened Bastia.
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