The 22-year-old replaced Moussa Dembele in the 83rd minute and immediately put the icing on the cake grabbing his side's fourth goal in the encounter.
Cornet,
Memphis Depay's brace and Houssem Aouar's lone goal in the second half helped Lyon fight back from a goal deficit in the early stages of the game to extend their unbeaten run to six matches across all competitions.
Despite the triumph, the Groupama Stadium outfit
Next on their schedule is a fixture against Saint-Etienne on November 23.