There had been reported optimism Khris Middleton might return for a Game 7 but that has not come to pass and he will be out.
However, early in the week there had been rumors the Bucks were optimistic Middleton could return if the series went long enough. Middleton remains out with a grade 2 sprain of the MCL in his left knee and the Bucks have given no official update. Part of that is an elite Boston defense, but part of it is how much the Celtics lean on Middleton to create in the halfcourt.