Joel Embiid is set to receive an MRI on Tuesday for his injured right knee.
Embiid suffered the injury after falling to the floor during the Sixers' 122-114 Game 4 loss to the Wizards.
Robin Lopez and Daniel Gafford combined for 28 points with Embiid out of the game.
"We're going to need him to be the last team standing, to win," said Danny Green after the game. "It doesn't mean we can't win the next game without him."