Sinia Plotz scored to begin each half and Anna Reed finished with 10 saves to lead Southern California to a 10-9 victory over California at the Canyonview Aquatic Center, earning the Trojans a seventh national championship in women’s water poloLA JOLLA, Calif. — Sinia Plotz scored to begin each half and Anna Reed finished with 10 saves to lead Southern California to a 10-9 victory over California on Sunday night at the Canyonview Aquatic Center, earning the Trojans a seventh national championship in women’s water polo.It’s the first championship for Casey Moon in his second season as the Trojans head coach. USC last claimed the title in 2021.Holly Dunn scored on a power play with 23 seconds left in the first quarter to pull Cal even, but Ava Stryker answered with seven seconds remaining and USC took a 3-2 lead.Emily Ausmus scored for a two-goal lead and Stryker added her second goal to give the Trojans a 6-3 advantage with 3:15 left before halftime. Eszter Varro answered with a goal eight seconds later for the Golden Bears and another one with 2:07 left to cut it to 6-5.Ausmus found the net with eight seconds left, but Dunn scored on a shot just before the buzzer to get Cal within 7-6 at the break.Plotz scored to begin the second half and give USC a two-goal lead, but Varro scored for the third time and Cal trailed 8-7.Meg …