Goals from Florian Thauvin and Saber Khalifa were enough to see off south-coast rivals Montpellier 2-0 on Friday, a result that kept Marseille in touch with the top three.
However, Elie Baup's side are likely to face a thorough examination of their abilities from Lille, who are four points behind leaders Paris Saint-Germain after a run of 10 matches without defeat.
PSG's resounding 4-0 win over Lyon on Sunday means they only have to avoid defeat away to Evian in order to equal a club record of 27 unbeaten league games.
Falcao's absence sparked a flurry of reports suggesting that he had fallen out with Claudio Ranieri, but the Monaco boss insisted his player needed time to recover from a thigh strain.
Ranieri told reporters prior to the Rennes fixture: "Against Nantes, he (Falcao) played well in the team and had two opportunities, but he could not really accelerate.
"The injury is less serious than a cramp. The examinations are good and did not show anything. But examination is one thing and personal feeling is another."
Sochaux have conceded 30 goals already so far this season, more than any other side. The league's bottom club will bid to register a second win of the campaign at home to Reims, who go into the game on the back of two heavy defeats.
