Katy Karabetsos scored in the 23rd minute directly off a corner kick in the first half, as Stevenson's girls soccer team edged Maine South 1-0 for Kevin Heffernan's first win as the Patriots' head coach.
"Your first victory as a head coach is one you will never forget," Heffernan said.
Stevenson keeper Sophia Godoy had 3 saves to earn her first blank sheet.
"Maine South is a tough opponent," Heffernan said. "They work hard every minute. You cannot take a play off the entire game."
Maine South had a goal called back due to an offside call late in the game as they were pushing to equalize.
"Sometimes you get a bit lucky," Heffernan said. "Today was one of those games. I'm so proud of this team. They bounced back after a tough loss to a strong New Trier the night before. We will build upon the strong effort we put in today."
Mundelein 4, Crystal Lake Central 0: Kaila Cancelli led the Mustangs with 2 goals and an assist.
Cristy Nambo added a goal and an assist for Mundelein (2-0), which led only 1-0 at halftime. Ashley Nensel made 5 saves in collecting the shutout. Kelly Grove scored the Mustangs' final goal, with Beth Grotlueschen picking up the assist.
Warren 4, Deerfield 0: The Blue Devils won their season opener, as Lindsey Hardiman scored twice, and Liz Carrano earned the shutout in goal.
Alliyah Parker and Valentina Rodriguez also scored for Warren.
Lakes 2, Grayslake Central 1: Bella Pighini and Maya Schmitt scored for the Eagles, who rallied for a win in their season opener. Nicole D'Ambrose and Izzy Quaranta had assists.
Lake Zurich 1, Fremd 0: Nicole Rasiarmos scored off a free kick with 14:20 left in the game, as the Bears improved to 2-0.
Eleanor Daleske notched the clean sheet with 5 saves.
Kara Jones made 8 saves in net for Lakes, which trailed 1-0 at halftime.
Buffalo Grove 7, Vernon Hills 0: The Cougars spotted the Bison a 4-0 lead by halftime in their season opener.