DUBLIN -- Sophomore Erin Greening scored in the 77th minute and the visiting Piedmont High girls soccer team upended Dublin 1-0 on Saturday in the quarterfinals of the North Coast Section Division II playoffs.
No. 6 seeded Piedmont (16-5-2), which didn't advance past the first round last season, will face either No. 2 Campolindo or No. 10 Acalanes in the semifinals on Wednesday.
No. 3 Dublin (8-9-7), which finished second in the tough Diablo Foothill Athletic League, controlled much of the first half, but the Highlanders turned it up a notch in the second.
The Gaels nearly equalized in the 79th minute, but hustling freshman Xenia Perea's shot from point-blank range went about a foot wide.
On her winning goal, Greening found some space on the right and ripped a low 20-yard shot past goalkeeper Alexandra Brown into the near corner.
"I wasn't expecting it," Greening said. "I saw an opening, and I just took it and it went in."
Piedmont's dangerous attacker Lindsay Vaughn shot off the post in the 57th minute.
"Fantastic," Piedmont coach Dan Chubbok said of his team's effort. "The first half was a bit of a struggle. We knew they were going to be physical. We knew they were going to be direct. Like I said to the girls, 'We need to make sure we play our game because that's how we're going to beat them.'"
Dublin started aggressively and stymied the Highlanders in the first 40 minutes, but Piedmont stayed calm and began to find seams with better passing.
Second-year Dublin coach Scott Schoenthal, whose team advanced to the finals last year, said his young team fought hard as it's done throughout the second half of the season.
"I'm very proud of this team, very proud of the effort they put in," he said.
Dublin captains Hailey and Megan Zummo and Brown gave strong efforts.
In the 12th minute Dublin nearly scored on Hailey Zummo's header from the far post off a free kick by Emma Schoenthal, but the shot just missed wide. Five minutes later, Dublin's Adrianna Nugen shot hard toward the opposite corner of the goal, but a defender, stationed inside the post, cleared the ball away.