Lille's record signing Marvin Martin will be out of action for four to six weeks after knee surgery.
The France international, 25, joined Lille from Sochaux for 10m euros (£8.46m) last year.
The midfielder came off in their 3-0 Ligue 1 victory over Ajaccio on Saturday after hurting his knee.
"Further examinations showed he had torn his internal meniscus," Lille said on their website. "He successfully underwent surgery on Thursday."