Meunier is a major doubt for Tuesday's trip to Manchester United after Paris Saint-Germain confirmed the defender has concussion.
The club announced Thomas Meunier has a concussion, with the right-back unavailable to take on Ole Gunnar Solskjaer's side as a result.
An official statement read: "Thomas Meunier's neurological examination confirmed a light concussion. Thomas will be unavailable until his next neurological consultation at the end of the week."
His absence will pose a further selection dilemma for Tuchel, who has been using right-back Dani Alves in midfield of late.