Genoa-Kingston had a commanding 25-15, 25-8 victory over Rockford Christian on Thursday at home.
The Cogs are 26-0 and have only lost one set all season.
Kaneland 2, Morris 1: At Morris, Kaneland (24-3, 12-0 I-8) outlasted Morris, 22-25, 25-15, 25-17 for the three-set win.
Indian Creek 2, DePue 0: At DePue, the Timberwolves won, 25-10, 25-7 with little resistance from DePue.
Brooke Probst had six kills, Audrey Witte had five kills, Kaitlyn Frazier added 17 digs, and Geena Sanford handed out seven assists in the win.
Sycamore 2, Ottawa 0: At Ottawa, the Spartans came away with a 25-17, 25-17 win.