The Wolumla Tigresses will progress in the FSC Football Association finals, edging Tathra 2-0 on Sunday.
The two teams were evenly matched from the outset as Tathra United doubled down their efforts defensively to keep the Wolumla contingent short of goals.
Play focused heavily around the left edge, where Tigress Anna Martin, with support from Sam Johnson, constantly found herself trying to best Poppy Beruldsen and Sam Crowley for possession.
United continued to show resilience in their back lines despite a few forward movements from Wolumla and even warding off some corner kick efforts.
However, late into the first half the Tigresses found the mark when they were awarded a direct free kick just outside the goal box.
Captain Kirsty McPaul lobbed a neat chip over the Tathra defence for Chloe Grant to finish cleanly with an overhead bicycle kick into the net.
United had their full 11, but were short of any subs and began to tire in the second half.
The team eventually succumbed to an own-goal after a hustle for the ball off a well-placed Wolumla corner kick.
The United side still fought well for opportunities with Amanda Stevenson working tirelessly up front, but she could not get past the defensive efforts of Tegan Grant and Caitlin Johnson at sweeper.
United began firing a few long-range attempts, but all were bundled up by Wolumla keeper Judith Orman to hold the 2-0 advantage.
The Tigresses will now face the Pambula Penguins in Bega for the preliminary final.