Jefferson has been out since December, and the 20th-ranked Blue Devils are leaning heavily on a six-man rotation.
Jefferson has shed a protective boot. After Saturday's win at North Carolina State, Krzyzewski said a bone in Jefferson's foot has ''healed pretty well'' and he's now working to ''walk properly'' without the boot or crutches.
Krzyzewski says Jefferson is also doing rehab work in a pool, but added ''I still think it's a while'' before he can return.
Jefferson was the leading returning scorer from last year's NCAA champions. He started the first nine games, averaging 11 points and 10 rebounds.