Bulli booked their spot in the Illawarra Premier League grand final with a 1-0 win over Port Kembla at WIN Stadium.
It was far from pretty, but the northern suburbs club did enough to bring the league championship winners' 16-game unbeaten streak to an end.
Matt Bailey's 36th-minute goal sealed the result for Bulli, who locked in a return to the beachside venue on grand final day.
"It's very good to be the first team in the grand final and get a couple of weeks' rest and get a couple of bodies right, which were probably a bit underdone," Bulli coach Ben Smith said.
"Matt Bailey has got a bit of an injury from today so hopefully that two-week break will help him and Ben McDonald will have two more weeks' training under his belt to get his fitness back."
Earlier in the match, Nuno Pires did his best to steal the limelight from the A-League stars on hand, with an acrobatic effort that just looped over the bar 14 minutes in.
His striker partner, Daniel Aliffi, had a chance of his own shortly after from a set piece, firing a curling attempt into the side netting.
Despite dominating most of the opening half an hour, Port were far from their best in attack, failing to craft the sort of chances that took them to a regular season title.
They were lucky to keep their keeper David Poeira on the park in the 39th minute after he handled the ball outside the penalty box.
Poeira had come out to clear the ball, but was beaten to the pill and threw out an arm to cover to his tracks.
He was handed a caution, but was made to pay from the ensuing free kick when Bailey showed all his class to whip the dead ball inside the post.
They carried the 1-0 advantage into the break and should have doubled it five minutes into the second half as Ben McDonald pushed his one-on-one shot wide of the goal.
He had a chance to atone for the miss less than 10 minutes later, but again failed to find the target from just six yards.
Bulli continued to keep Port under the pump in a search of their second goal, with Jared Fish slamming a shot off the crossbar.
As the minutes ticked away, Ben Smith's men prepared themselves for a token late Port goal, but it was not to be, as Bulli set up their grand final date.
"To be honest, it was a pretty scrappy game," Smith said.
"A bit of class from Bailey from the free kick got us the lead, but we were under a lot of pressure for the first half. It is great to get the win and not play that great but still win."
In the losing dressing room, Port coach Stuart Beedie was realistic about his team's performance.
"It was one of those days for us. I think Bulli fully deserved to win," Beedie said.
"We have won 16 games on the trot so I would rather lose one now than in two weeks' time or next week."