Avon def. Andes Central/Dakota Christian, 25-14, 25-10, 25-12
Bridgewater-Emery def. Wessington Springs, 25-3, 25-13, 25-10
Britton-Hecla def. Tiospa Zina, 25-12, 25-12, 25-12
Corsica-Stickney def. Centerville, 25-15, 25-18, 25-19
Dakota Valley def. Elk Point-Jefferson, 22-25, 25-17, 25-12, 25-11
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Dell Rapids St. Mary def. Mitchell Christian, 25-11, 25-5, 25-19
Freeman def. Howard, 25-21, 25-17, 25-22
Gregory def. Lyman, 25-18, 25-17, 25-19
Hamlin def. Flandreau, 25-20, 26-24, 25-22
Huron def. Aberdeen Central, 25-22, 25-16, 25-21
Ipswich def. Waubay/Summit, 25-23, 25-11, 25-21
Kimball/White Lake def. Burke, 25-17, 25-20, 26-24
Madison def. West Central, 25-16, 25-19, 25-17
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Menno def. Freeman Academy/Marion, 25-14, 25-13, 25-14
Milbank def. Sisseton, 25-7, 25-19, 25-15
Miller def. Sully Buttes, 25-11, 25-19, 25-19
Mount Vernon/Plankinton def. Bon Homme, 25-14, 25-18, 25-16
Northwestern def. Langford, 25-11, 25-13, 25-13
Parker def. McCook Central/Montrose, 25-23, 25-21, 15-25, 14-25, 15-13
Parkston def. Hanson, 25-11, 25-23, 25-13
Platte-Geddes def. Colome, 25-7, 25-16, 25-20
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Rapid City Christian def. Sturgis 3-0, set scores not immediately available
Sanborn Central/Woonsocket def. Ethan, 25-18, 21-25, 25-20, 25-19
Scotland def. Canistota, 25-19, 15-25, 18-25, 25-13, 15-13
Sioux Falls Lincoln def. Sioux Falls Roosevelt, 25-23, 25-20, 24-26, 16-25, 15-13
Sioux Valley def. Clark/Willow Lake, 25-16, 25-14, 25-18
Wagner def. Chamberlain, 25-10, 25-16, 25-12
Warner def. Leola/Frederick, 25-10, 25-17, 25-10
Webster def. Deuel, 22-25, 25-17, 27-25, 15-25, 15-6
Winner def. Valentine (Neb.), 25-20, 25-14 and 25-23
Yankton def. Beresford, 25-13, 25-14, 25-16