Wall is averaging 18.1 points and 9.8 assists after being the top draft pick last spring. He has been sidelined with what the team has been calling a sprained left foot.
The 7-foot Yi has a bruised right knee. He is averaging 7.6 points and 3.1 rebounds.
Washington coach Flip Saunders said he was hoping Wall could play at Detroit on Sunday, but wouldn't unless he was able to run without pain. Saunders said that Wall still had "a bit of a bone bruise on the inside of the ankle."
Yi said he doubted that he would be able to play Sunday.