CHAPEL HILL — North Carolina faces a two-part challenge Saturday against Duke: contain one of the nation’s most productive playmakers and find a way to get its running game going against the Blue Devils’ stout defense. Duke’s Nate Sheppard has been difficult for every opponent to stop, while the Blue Devils rank No. 10 nationally in run defense. The Tar Heels must solve both problems to have a chance to control the game on the ground.
