The play capped a weekend in which the Tar Heels, led by Pyles and fellow outside hitter Laura Greene, left Georgia Tech and Clemson bruised and battered while UNC stayed atop the ACC standings.
The No. 13 Tar Heels swept Clemson 3-0 on Saturday, one night after pulling out a dramatic 3-2 victory over the No. 23 Yellow Jackets.
"The most important thing was to beat Georgia Tech," said UNC coach Joe Sagula. "I think Clemson is a very good team, and to beat them 3-0 is a really great indication for us."
Sagula said the Tar Heels (23-2, 10-1 in the ACC) were concerned that there could be a letdown after beating Tech, but they squashed those concerns by jumping on Clemson (15-12, 6-6) early, eventually closing out the Tigers 30-27 game one.
In the second game, Sagula gave a couple of regulars some rest. Coming off the bench, Katie Wright racked up five kills and a block, while Dani Nyenhuis nailed the game-clinching kill.
"Anytime you come in you just want to play your absolute best, bring up the intensity of the team, and it was pretty crucial for anybody coming in tonight to bring exactly that," Wright said.
After taking a 2-0 game lead, UNC fell into another third game funk, a problem the team has been battling all year.
But Pyles snapped them out of their doldrums with her overpowering service ace that jumpstarted an 8-1 run.
"It was actually at a really good time for that to happen because we were down a little bit," Pyles said. "I think that helped turn the momentum around."