Here is the official word from Duke Sports Information -
"Sophomore guard Nolan Smith is probable for Duke's opening round game of the ACC Tournament on Friday. Smith has missed the Blue Devils last three games after suffering a mild concussion on Feb. 25 at Maryland. He is averaging 8.5 points and 2.3 rebounds per game in 28 contests this season."

We fully expect him to play in that he has been practicing close to full speed.