'Bunje' played for the first time in the mask on his comeback game for the reserves on Tuesday a month after fracturing his cheekbone in the Premiership clash against Chelsea.
He completed 90 minutes against West Ham and has trained again wearing the mask since.
But he admitted it was slightly uncomfortable and Glenn Hoddle revealed: "Goran played a reserve game against West Ham with the mask on and he found it difficult.
"He said he wanted to train without it but I told him he needs to keep it on because of the precautionary side of things - if he gets a whack it could set him back a long way. We can't take that risk.
"I have to sit down with the doctor and decide which is the best way forward for Goran. He still needs a little more football.
"He will probably be in the squad though and there is a possibility he might come into the frame."
Glenn reported that Gus Poyet and Les Ferdinand has been hit by a touch of 'flu but both are expected to be okay for Sunday's televised affair at St James' Park.
Meanwhile, Newcastle winger Laurent Robert has returned from compassionate leave and will be available on Sunday.
Robert has reported for a private training session with fitness coach Paul Winsper and will now have two days to prepare himself.
Meanwhile, full-back Andy Griffin could return to action against Glenn Hoddle's men after finally shaking off the groin strain which kept him out of the 1-0 Worthington Cup win at Barnsley and last Saturday's trip to the Reebok Stadium.
All eyes will be on the man in the mask this weekend - the big question is whether or not Goran Bunjevcevic will return to action in a special protective mask at Newcastle.