Defending champions France are hoping Karim Benzema and Raphael Varane will be fit enough to feature in their opening World Cup match against Australia, with teammate Adrien Rabiot insisting both are "determined to play".
Benzema has been struggling with a thigh problem while Varane is recovering from a leg injury.
Both players trained apart from the rest of the France squad during a session open to the media at the home stadium of Qatari champions Al Sadd on Thursday evening.
"Karim and Raphael are doing really well," Rabiot said on Friday. "They trained apart because that was the protocol that was in place for them.
"They are good and are really keen to play, but I don't know if they will be involved in the first match."
Real Madrid striker Benzema, who last month won the Ballon d'Or, played less than half an hour of football in his club's last six games before the World Cup.
Manchester United centre-back Varane has not played a game since coming off in tears against Chelsea on October 22.