Fremd delivered a perfect performance in the girls badminton sectional it hosted Friday, qualifying participants in both slots for the championship singles and doubles matches.
The Vikings won with 18 points in the team race, topping runner-up Hersey (10) and third-place Maine West (9).
Mid-Suburban League No. 1 singles champ Angela Wu, a junior, topped senior schoolmate Kelly Owens 21-9, 21-10 in the singles final.
Maine West senior Brittany Gorski topped Hersey senior Steffi Antony in the third-place singles match.
In doubles, Fremd seniors Rina Seo and Momoka Shimizu defeated their teammates, seniors Sarah Spiewak and Christine Williams, 21-15, 21-13, for the championship.
In third-place double play, Maine West juniors Olenka Kalinowski and Rachel Andersen defeated Hersey juniors Megan Salt and Paul Yang.
Fremd won state badminton championships in 2007 and 2009.
This year's state tournament is next Friday and Saturday at Eastern Illinois University.