Lyon coach Bruno Genesio is unable to offer assurances over Nabil Fekir's future at the club.
The France international forward was close to joining Liverpool in July before the Ligue 1 club withdrew from negotiations .
Chelsea, who defeated Lyon on penalties in an International Champions Cup meeting on Tuesday, have been linked with a move for the 25-year-old, while La Liga giants Real Madrid have also been mentioned as a possible suitor.
Fekir returned to training with Lyon this week, but his manager is braced for more interest to come in on the player.