Deschamps admits Mendy's injury problems are a concern.
He said: "He had a serious glitch before the World Cup. He came without being in full possession of his means. He relapsed and had other problems later. And today unfortunately, he is a player who is not available.
"I told him, I tell him again, he must do everything to give himself the means to return. He's a force of nature athletically but with such a big injury, nature can not make you feel good. It takes a lot of work, before and after. I think he does it but he could do it better certainly."