Morris is adamant that he'll play tomorrow, though ultimately I don't think it's his call. As others have said, even if he does come back, he won't be near the player he was. That kind of ankle sprain is really hard to recover from, and a guy that relies on athleticism like Morris will have real trouble with it.
I expect him back for game three, but I don't see how he plays tomorrow, at least with any sort of effectiveness.