Jessie Harris had 17 kills to help the third-ranked Corona del Mar (10-1) to a five-set victory over eighth-ranked San Clemente.
Kendal Kipp and Natalia Bruening had 13 and 12 kills, respectively in the 24-26, 25-20, 28-30, 25-16, 15-10 home victory.
Alex Osterberg had six kills for CdM.
In other action
Woodbridge 3, Mission Viejo 1: Mima Mirkovic led the host Warriors with 18 kills in a 25-21, 17-25, 25-16, 25-13 home victory.
Cece McWilliams and Sydney Tekstra had nine kills apiece in the victory.
No. 7 Edison 3, El Toro 1: Lauren Schuck had 18 kills and Raina Walencewicz had 11 to lead the host Chargers to the 25-20, 19-25, 25-14, 25-16 home victory.
JSerra 3, Saddleback Valley Christian 0: Gigi Hernandez led the Lions with 18 kills and 15 digs and Caroline Kennedy added nine kills in a 25-23, 28-26, 25-22 home victory.
Maxine Burke had 13 digs for the Lions.
Whittier Christian 3, Brea Olinda 0: Mandy Sides had 13 kills and nine digs as the Heralds (16-2) swept the host Wildcats, 25-17, 25-16, 27-25.
Molly Patapoff had 20 digs. Delaney Harris had four kills and 31 assists.
