The central defender was solid in the middle of the park, using his pace and power to try and replace N'golo Kante for the Foxes.
Leicester opened the scoring after a long Luis Hernandez throw-in led to Hans Vanaken flicking a header out of goalkeeper Ludovic Butelle's hands, and Marc Albrighton was on hand to bundle home his side's first ever Champions League goal.
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Once again, Leicester punished their opponents as Riyad Mahrez curled a free kick over the wall and into the top-left corner of the net to take a two-goal lead into the break.
Michel Preud'homme's charges did not shore up their defence after the restart and, just before the hour, Butelle clattered into Vardy to gift the Foxes a penalty, which Mahrez coolly slotted down the middle.