Newcastle Knights centre Sione Mata'utia has been ruled out of Sunday's match against the Wests Tigers due to concussion.
Mata'utia suffered a head knock early in the Knights' match against the Melbourne Storm last weekend.
He is expected to be available to play next weekend against the Brisbane Broncos.
Meanwhile, Danny Levi remains in doubt to play as he continues to manage a back injury.
CLICK HERE for the injury update on Robbie Rochow.