With less than five minutes remaining in the fourth quarter, all four UNC guards tried to catch their breath at the free-throw line, gasping for air with hands on their knees.
North Carolina's energy had slipped away, and along with it, the chance of a comeback.
Exhaustion set in across the No. 8 UNC women's basketball roster in the second half. The Tar Heels lost control before ultimately falling, 68-53, to No. 16 Duke at Cameron Indoor Stadium on Thursday night in their first road game loss this season.
The absence of UNC’s two leading scorers, graduate forward Alyssa Ustby and sophomore guard Reniya Kelly, forced guards Lanie Grant and Grace Townsend to play season-high minutes. Pressured to step up offensively, the burden was too much for the North Carolina bench.

“You're asking guys to play 30 more minutes than maybe they usually do," head coach Courtney Banghart said. "So I think the fatigue sort of set in halfway through."
The exhaustion manifested itself in different ways throughout the game.
"Mental energy mistakes" led to poor passing decisions or jammed spacing. The Tar Heels coughed up the ball 20 times in total. Eight of them were unforced.
And when Duke got out in transition because of the giveaways, UNC didn’t have the energy to get back defensively. Duke's 25 points off of turnovers ties the season-high for a North Carolina opponent this year.