Victorino, the 2002 PCA Open champion and Philta Open winner last month, will meet fellow national and fourth seed Rolando Ruel Jr., who scored a 7-5, 6-2 win over No. 8 Michael Mora III.
Second seed and Philta Open runner-up Adelo Abadia also earned a semifinal berth after beating former RP Davis Cupper and now tennis center administrator Beeyong Sison, 7-5, 6-2.
Abadia, a regular Davis Cup campaigner, will face third seed Johnny Arcilla, a 6-0, 6-1 winner over Zamboanga del Norte pride Rocky Paglalunan.
In the women’s singles, top-ranked Ana Patricia Santos stamped her class over seventh seed Petrona Bantay, 6-1, 6-0, to advance in the semifinals of this Philta-sanctioned Group A event sponsored by Subic Bay Metropolitan Authority chairman Felicito Payumo, Union Bank, PLDT, Dunlop-Slazenger, Wilson Sports and Penn, the official ball.
Santos, the Philta Open champion, will shoot for a final slot against College of St. Benilde player Deena Rose Cruz, who blasted Marietta Erorita, 6-0, 6-0.
Second seed Alyssa Labay of Bacolod City defeated sixth seed Ivy de Castro, 6-2, 6-4, to forge a semifinal showdown with third seed Bien Zoleta of Lucena City, a 6-3, 6-1 winner over No. 8 Josephine Paguyo.
The top-seeded pair of De Castro and Labay downed third seeds Cruz and Bantay, 6-2, 6-3, to advance in the final.
The second final slot will be disputed by second seeds Santos and Aileen Rogan, who survived Divine Escala and Paguyo, 7-5, 7-6 (4), and Ara Micayabas and Zoleta, who won by default.