The Turkish Super Lig champions claimed a 4-2 victory over his former club at the Stade Pierre-Mauroy on Tuesday night.
Osimhen scored Galatasaray’s fourth goal in the keenly contested encounter.
The Nigeria international, who was named Man of the Match, was pleased with the outcome of the game.
“I love this stadium. The fans are incredible. We had a tough match. I’m very happy for our team; we won. I also wish Lille good luck in their next matches,” Osimhen was quoted as saying by Galatasaray’s official website.
“Lille players are very tough. They even took the lead. We managed to win the match together as a team. I’m happy we got the three points.”
