SANDUGO-San Sebastian looks to complete a title series sweep, while Cagayan Valley-Perpetual Help hopes to force a decider when the Shakey's V League Open Conference finals resumes Tuesday the Ninoy Aquino Stadium.
The Lady Stags drew first blood 18-25, 29-27, 14-25, 25-13, 15-7.
Thai guest players Jeng Bualee and Utaiwan Kaensing, the six-time Best Scorer and back-to-back Best Blocker awardee, respectively, will again lead the Lady Stags in the 6 p.m. game.
Bualee unloaded 26 points and Utaiwan came up with 23 in opener of the best-of-three series.
Cagayan Valley also has Thai reinforcements in Kunbang Pornpimol and Sutadta Chuewulim, who produced a combined 27 points in their last game, but all eyes are on conference MVP Sandra de los Santos as they try to force a do-or-die game three.
Team captain and Best Server Joy Cases, Best Attacker Honey Royse Tubino and Best Digger libero Jeck-Jeck Dionela are also expected to step up for Cagayan Valley.
Meanwhile, Ateneo will also try to go for back-to-back wins to complete a sweep of the best-of-three battle for third place against the dethroned defending champion Philippine Army at 4 p.m.
The Lady Eagles played without team captain Gretchen Ho, but got huge contributions from Alyssa Valdez, Fille Cainglet and Dzi Gervacio, who came up with 22, 17 and 17 points, respectively, in the 21-25, 25-19, 25-22, 18-25, 13-15 victory.