I think you should be fine, if they interviewed late last week they would have sat down and discussed all the applicants at some point today, may not have been until this afternoon..... who knows?

I would say Tuesday is still early next week and if they said they would call, they may well do with a decision either way!

Fingers crossed you get the answer you want tomorrow (if not I would say wed may also just squeeze into the early part of the week )