If this proves to be a one-game absence for Porzingis, the Celtics should be fine moving forward, as even a loss on Christmas Day is rather inconsequential over the course of an 82-game season. But if this injury ends up extending past Santa Claus's return to the North Pole, then that becomes a completely different story, as the Celtics might have to get creative at the deadline to strengthen their big man depth just in case.