His absence has sparked concern among Celtic fans.
However, reports suggest the winger was only missing due to a minor issue.
Middle Eastern outlet Al Araby reports that Tounekti is suffering from a thigh injury.
He underwent tests on Monday morning that showed he is fine, but needs some days of rest.
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The 23-year-old is ‘likely’ to feature against Namibia on Monday.
Tounekti has made an impact since joining Celtic from Hammarby on transfer deadline day in the summer.
He has consistently impressed with his performances, scoring his first goal for the club in the Premier Sports Cup against Partick Thistle.
Manager Brendan Rodgers said: “He excites me every time he gets the ball, and that’s what we were desperate for in the team.
“He’s come in really aggressive.
“He’s a really talented boy because he can go either way and also, not only that, he can run in behind.
“You see the numbers of times he makes runs.
“Sometimes he doesn’t get it, sometimes he does, but he’s running off the ball as well.
“I’m really excited for where he is and where we can bring him to.
“But importantly, supporters will love watching him because he’s so exciting.”
Rodgers added: “The DNA of this club is based on attacking football and that is with wingers on the side of the pitch that can take people on, beat people.
“Every time he gets the ball, you just sense the excitement and that’s what we need on both sides.”