Tauranga's Jamie Oakley, 18, of the Devoy Squash and Fitness Centre, caused a huge upset on day one by beating his coach and sixth seed Kashif Shuja in straight sets.
"I didn't really expect to win, let alone win 3-0. That was just a bonus, I guess," Oakley said.
"It was a weird feeling as I didn't really know whether to be happy or a bit edgy. But I will take it and it is good for my confidence playing against those guys. He is obviously coming to the end of his career and is happy to see me play so well."
Oakley's mother, Dame Susan Devoy, was part of a good-sized crowd at the Carrus Glass Court in the Tauranga Boys' College gym on Friday night.
"I think she was as shocked as I was, I guess. She is an awesome squash player and even better Mum so I can't ask for much more than that."