I think its vital we know how fit he is before Tuesday and one game IMO won't tell us that. Without him, we have managed to get to the semis, so I would push him hard these next two games to see whether he is likely to stand up to it.
It would be criminal to partially play him tonight and Sat to see him get injured on Tues and the disruption that would cause. I understand there is a counter argument saying three games in succession could cause injury, but that's true for a fair bunch of our team who will play the three.