Siso of the University of San Carlos South Campus clobbered the older Jerber Mamawal, 8-1, to set up a final duel against Larry Antigua.
Siso, the top seed here and No.4 in the PHILTA rankings in the boys 14-under, was not allowed to join his age-group with the event being a non-ranking competition.
This means the top 20 male players in PHILTA and the top 10 in the girls division could not join their age-group, prompting the organizers to add the 21-under class.
Niño's sister, Sallydine, also barged into the semifinal round after disposing off Janice Cañete, 8-1, in the girls 14-under quarterfinal.
The other girls 14-under matches saw Tonette Javaro winning against Maria Dovieven Loreto, 8-2, and Kara Abadia defeating Jennifer Jaca, 8-6.
In boys 16-under, Cyril Camporedondo breezed past Ken Tuñacao, 8-0, to reach the championship round. He will face next the winner between Lloyd Cañete and Jason Espinosa.
In the girls 12, Hannah Grace Espinosa outsmarted Sharalyn Tuñacao, 8-5, while Kimberly Uytico defeated China Jean Comeros, 8-3.
Baybay, Leyte's Keisha Adelyn Jabinez also made her presence felt by dispatching Irish Jaca, 8-6, while Bianca Sinabre posted an 8-6 beating of Catherine Padilla.
In the boys division, the Cabahug twins Christian Paul and Christan John, on the other hand, were also victorious in the boys 14-under. Incidentally, they scored similar 8-2 wins over Christian Gerra and Paul Adendon, respectively.
Kevin Mamawal made sure not to suffer the same fate like his older brother after pulling off an 8-4 win against John Ralph Roa, while Junnel Espinosa silenced Mark Macahipay, 8-0.
In the boys 12-under, the winners in the quarterfinals include Mark Norman Enriquez over Carl Rietmuller, 8-2, Junnel Abellanoza over Christian Soon, 8-6, and Harvey Sincolan against Ronnie Andrin, 8-6.
In the unisex 10-under, John Michael Necesario dumped Oliver Booth, 8-0, Dumaguete's Van Abestado defeated Joshua Kinaadman, 8-1, Alexis Ondoy overpowered Shutarro Kibayashi, 8-2 and Lucas Rietmuller survived againstChristian Ugarte, 8-7 (7-1).