The 26-year-old defender injured his foot ten days ago against CD Once Caldas in the Peace Cup tournament in the Korean Republic. Further analysis has diagnosed a metatarsal fracture, which could keep him out for 12 weeks - making him doubtful for the first three Champions League group stage matchdays.
Abidal, who could also be unavailable for France's last four FIFA World Cup qualifiers, said: "I hope to recover faster. I had injuries last season and came back OK. I have no worries about that."
Under new coach Gérard Houllier, Lyon play in the French Super Cup on Wednesday at AJ Auxerre and start their title defence on Sunday at newly-promoted Le Mans UC 72.
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