The Ghana defender was replaced after 26 minutes of their 2-2 draw against Toulouse after suffering the injury setback.
Manager Julien Stephan has revealed that the Black Stars centre-back injured his muscle, and hopes in just a minor knock.
"Alex has a little muscle problem. It pulled a little on the ischio, I hope it's not too serious," he said after the game.
His injury situation is a major concern for the technical handlers of the Black Stars with a month remaining to start the World Cup in Qatar.
