The Baggies boss is preparing his squad for the side's return to Premier League action with a trip across the Midlands to face Leicester City at the King Power Stadium on Monday night.
And he revealed that here a few players returning from international duty carrying knocks which will need to be assessed over the weekend before he can determine who will face the Foxes.
Chadli was away with the Belgium squad, while Morrison and Robson-Kanu featured for Scotland and Wales respectively as both nations failed to qualify for the World Cup play-offs.
And looking at their chances of lining up against Leicester, Pulis said: "Nacer is seeing a back specialist abroad and he won't be back in the building until Saturday morning.
"Hal has a little strain and Mozza [Morrison] hurt his calf muscle so there are a couple of niggles. Two days extra might help."