The central defensive pair are both battling with ongoing groin injuries as we prepare for the fifth round replay at the City Ground.
Andy Reid is also out cup-tied against his former team but Thimothee returns to the squad after recovering from the minor knee injury that forced him out of Saturday's win against Fulham.
Head Coach Martin Jol reported: "Thimothee is fit so he's available for selection, he has trained with us and could play.
"We have a couple of questions marks because Ledley King and Noureddine Naybet are both struggling and as everyone knows, Andy Reid is cup-tied."
Thimothee Atouba is fit but Ledley King and Noureddine Naybet are both struggling to make Wednesday night's FA Cup replay at Forest.