The junior from Jericho, N.Y., scored in the 52nd minute on a 30-yard strike from the middle of the field. The goal clinched Duke's first victory against UNC since 1999.
The shot seemed impossibly precise. Cila blasted his shot toward the net, and it dipped at the last second into the top left corner.
Cila, though, played down the shot's difficulty.
"Ian (Carey) cut the ball back," Cila said. "I did a step-over right, the defender fell for the move, and I took the shot."
Even when pressed for a description, he remained technical.
"It was hard, accurate and dropped a bit," he said.
Tar Heel goalie Ford Williams leapt to stop the shot, but making that save would have been a stretch even for U.S. national team goalkeeper Kasey Keller.
"I like to think that all shots are saveable, but that's one of the harder ones," Williams said.
For UNC coach Elmar Bolowich, watching the shot was excruciating.