Koerner had eight points by halftime as the Wildcats took a 17-4 lead.
Keily Linger had four points for Windham (0-7), which will travel to Hunter-Tannersville on Thursday.
Stamford 33, Jefferson 20
Nalaeh Meier scored five points during a 12-2 third-quarter run that lifted host Stamford to a Delaware League victory.
Stamford extended a five-point halftime lead to 25-10 after three quarters. Meier finished with nine points. Teammate Erin Hull had a game-high 11 points.
Emily Wenner had nine points for Jefferson.
Stamford (5-1, 4-1) will play Milford in the final at Stamford Tournament on Saturday.
Morris 45, Schenevus 33
All but six of Kelsea Webster’s game-high 19 points came before halftime as host Morris opened a 10-point lead en route to a Tri-Valley League victory.
The Mustangs (5-0) received 10 points, 14 rebounds, three blocks and three steals from Haley Wist.
Sarah Mellor and Sierra Bentley had 11 and nine points, respectively, for Schenevus.
Morris will travel to Gilbertsville-Mount Upton on Wednesday.
UV 57, Sidney 31
Six of Corrine Izard’s 14 points came during a 17-0 run in the third quarter that helped visiting Unadilla Valley to a Midstate Athletic Conference victory.
Kelsey Decker, who scored a game-high 18 points, hit both of her three-pointers in the first half as Sidney stayed close at 23-18.
“They went to a 1-3-1 trap and we couldn’t get any shots,” Sidney coach Brad Aldridge said of the Storm’s 17-0 third-quarter dominance.
Amanda Off had a team-high 17 points for the Storm, who received eight points apiece from Taylor Davis and Jordan Anderson.
Sidney (1-7, 1-3) will play at Afton at 6 p.m. Tuesday.
B-G 26, Hancock 19
Morgan Bullis scored half of her game-high 12 points in the second quarter as Bainbridge-Guilford won a Midstate Athletic Conference road game in which neither side scored as many as 10 points in a quarter.
Bullis’ second quarter helped the Bobcats to a 14-8 halftime lead.
Hancock pulled to 21-16 in the fouth quarter, but a 1-for-8 performance from the free throw line prevented the Wildcats from getting any closer. For the game, Hancock went 4-for-21 from the line. B-G was slightly better at 6-for-16.
Lea Newman had seven points for the Wildcats (4-5).