Osimhen set up Jonathan Ikone for the only goal of the game in the 68th minute .
The Nigeria international has now scored eight goals and provided three assists in 15 league appearances for Les Dogues.
The 20-year-old featured for the entire duration of the game.
Lille now occupy fourth position in the Ligue 1 table with 25 points from 16 games.
Christophe Galtier’s men will host Brest in their next league game on Friday.