 On 22 October 2009, Landreau was back on the bench in Europa League during the match against Genoa (3–0) and made his league debut for Lille in a 2–0 win over Grenoble on 30 October 2009.In the 2010–11 season, Landreau was involved the Lille squad that won the Ligue 1 for the third time in club history and the first time since 1954.He made history by becoming the first player ever to compete in the Trophée des champions with three clubs.