Sophomore Deanna Watson added six points, five steals and seven rebounds for Prep, which entered the contest ranked ninth in the CIF-Southern Section Division IV-A rankings.
Poly (13-9, 4-3), which was outscored, 38-12, after halftime, was led by Tammy Newman’s 12 points and nine rebounds.
Both teams struggled from the outside, combining to go 0 for 15 from three-point range.
After the deciding third quarter, the only thing left in doubt was to see if Prep senior guard Courtney Robinson could follow up her triple-double on Friday night with an encore performance Saturday.
Robinson recorded 15 points, 11 steals and 10 rebounds in Friday’s victory over Westridge.
While Robinson fell just short of a triple-double Saturday, she still turned in a stellar all-around game, finishing with 10 points, seven steals, six assists and six rebounds.