It will be Barrington and Fremd competing for the Fremd girls water polo sectional championship and a spot in the state's Elite Eight at 11 a.m. Saturday.
Getting there was anything but easy for the top-seeded Fillies, who got quite a challenge from Conant in Friday's semifinal.
After the game was tied at 4 at the half, Barrington outscored the Cougars 4-2 in the third period.
But Conant stayed close, and when Angie Skittone scored in the fourth quarter with 1:11 left, the Cougars drew within 9-8 before Barrington was able to run out the clock.
Fillies senior Catherine Byron led all scorers with 4 goals, Lisa Danhauer had 3 and Sam Gavars 2 for Barrington.
Carmen Rosas (3 goals) and Kaitlyn Claffey (2) led Conant, and goalie Maddy Demaret stopped 14 shots and had 5 steals.
• No. 2 seed Fremd advanced with an 8-3 victory over Mid-Suburban East champion Hersey. The Vikings were the only team in the Mid-Suburban League to defeat Barrington in the regular season.
The two tops seeds in the Mundelein sectional advance to Saturday's noon championship with decisive victories in Friday's semifinal matchups.
Top seed Mundelein eliminated Libertyville in a 12-3 decision, while second seed Stevenson eliminated Wheeling 15-4.
Karrie Kozokar led Mundelein with 5 goals, and Julia Ahlgrim had 2 for Libertyville.
Stevenson's top scorer was Ashley Oliver with 4 goals, and Brittany Gartenberg and Allison Travetto had 3 each. Theresa Godlewski led Wheeling with 3 goals.