Rennes midfielder Yann M'Vila is almost certain to miss France's Euro 2012 opener against England on Monday.
France's medical staff admitted on Friday they are "not optimistic" of the tough-tackler being available for Les Bleus' opening game.
Team doctor Fabrice Bryand told L'Equipe: "His progress is good but we do not want to aggravate the injury. We are not optimistic for the 11th.
"We will increase his workload and see if his ankle swells again or if he suffers any ill effects. We will pay close attention to the player's recovery."
But France have been given a boost as Blaise Matuidi and Alou Diarra are both making good progress in their recovery from setbacks.
Bryand admitted Marseille midfielder Diarra had given the squad "a big scare" when he felt pain in his knee, having been pencilled in as the man to replace M'Vila.
But he added: "He suffered a slight inflammation of the tendon behind the right knee, but it is going well.
"Yesterday, we did not take any risks because we were training on a synthetic pitch, but he was initially going to train."
On Paris Saint-Germain's Matuidi, Bryand added: "His progress is very satisfactory. He has started a special program and we will accelerate that and bring him back gradually.
"Everything depends on how he reacts."
