Racing Club de Lens (commonly referred to as RC Lens or simply Lens), is a French football club based in the northern city of Lens in the Pas-de-Calais department. Its nickname, sang et or (blood and gold), comes from its traditional colours of red and gold. Their primary rivals are their northern neighbours Lille, with whom they contest the Derby du Nord.
The Stade Bollaert-Delelis is the main football stadium in Lens, France, that was built in 1933. It is the home of RC Lens. The stadium's capacity is 38,058 – about 7,000 more than the city's population. The stadium was originally named after Félix Bollaert, a director of Compagnie des Mines de Lens, who was anxious to promote the development of sports clubs in the city. Construction began in 1931, though Bollaert died shortly before the stadium's inauguration. It was renamed Stade Bollaert-Delelis in 2012 after the death of André Delelis, former mayor of the city and politician who served as the Minister of Commerce under President François Mitterrand.