Stade Rennes midfielder Stephane Dalmat has been released from hospital and is fine, the club said in a statement, after he was admitted with an undiagnosed illness following Thursday's Europa League draw with Atletico Madrid.
He could still be doubtful for Sunday's trip to champions Lille.
Vast French media speculation linking the newly rich club with a move for Los Angeles Galaxy's David Beckham in January is also threatening to engulf the outfit and coach Antoine Kombouare wants total concentration on Lyon.
"[Athletic] is the end of a good run but it is only one match. We have to respond on Sunday against Lyon," he told reporters.
"They are neither two small accidents without consequence nor a very worrying major incident," club president Alexandre Lacombe told reporters.
