Tanner was the seventh score that beat out Fountain Valley's after the teams tied and the sixth-player score (Emily Leahy) tied.
Cassie Stevenson (42), Jillian Tanner (46), Frankie Thorpe (52) and Melissa Morel (53) also scored for Estancia (2-1).
Aliso Niguel 212,
Newport Harbor 255
ALISO VIEJO – Charlotte Skjonsby shot an eight-over-par 43 in the Sailors' season opener at Aliso Viejo Golf Course Tuesday.
Tara Hanna finished with a 45 for Newport Harbor, followed by Alley Damser (53), Lauren Pfeifer (56) and Amelia Thomas (58).