Tabotabo will be meeting Eric Olivarez in the singles division semifinal round this Friday.
He is also set to play in the doubles event.
Tabotabo opened his bid with a bye in the 10-under action but came up with a convincing second round victory over Kyle Joseph, 6-0, 6-1, to meet Paulo So in the quarterfinals.
Again, Tabotabo, who is supported by Cebu vice governor Greg Sanchez, Lacto Pafi and Accord Bank, easily scored a 6-0, 6-1, victory over So, the son of the former Davis Cup player Rolando So.