After X-Rays on Thursday morning, Hairston tweeted that there was no fracture or broken bone, but added "sorry to say but I will not be playing Saturday!"
However, after additional medical tests showed a sprain and contusion, UNC announced his official status for Saturday's game as "questionable."
Hairston is Carolina's fifth-leading scorer (8.3 ppg) and leads the Tar Heels with 14 three-point goals -- despite averaging just 12.1 minutes per game. He scored a season-high 19 points against South Carolina and 15 against UNLV and was named to the Las Vegas Invitational All-Tournament Team.
UNC Athletic Communications contributed to this report