Lille Olympique Sporting Club ( French pronunciation: [lil ɔlɛ̃pik spɔʁtɪŋ klœb] ), commonly referred to as LOSC , LOSC Lille or simply Lille , is a French professional football club based in Lille , Northern France competing in Ligue 1 , the top division of French football . Lille have played their home matches since 2012 at the Stade Pierre-Mauroy . The 50,186-capacity retractable roof venue is the fourth-largest stadium in France .
