A torrid start was followed by a tepid second game, in which the Blue Devils (14-6, 2-3 in the ACC) dominated a sloppy UNC squad.
But the Tar Heels (16-1, 4-0) turned things around, winning the last two games for the victory. However, the win didn't erase North Carolina's mid-match missteps.
"This is one of those ones that leaves us very unsatisfied in the level of play," said UNC coach Joe Sagula. "When we came out, I was so excited with how well we were playing early, and I just want to see us maintain that level."
One Tar Heel who maintained it throughout the match was outside hitter Molly Pyles, who led the team by matching her career-high with 18 kills and recording a personal-best 17 digs.
Middle hitter Aletha Green also had an above-average day, tying her career-best with 11 kills.
The Duke-UNC rivalry was omnipresent and emotions ran high -- notably in UNC senior Malaika Underwood.
Underwood let loose primal screams after making big plays and constantly implored her teammates to pick up their games.
"Every time we play Duke, we want to get up and have a good game," she said. "There's the rivalry, and we play hard every minute. So I am a little more emotional when we play Duke."
UNC used the rush to handily win the first game.