In the opener, Catmon hacked out an easy 25-15, 25-12 score over host team Carmen, however, Catmon got a strong resistance before trouncing Danao, 23-25, 25-21, 25-22.
Sogod, on the other hand, scored a 25-19, 25-19, over Danao.
However, it was not always a smooth ride for Sogod as they had to battle a first set deficit, 17-25, before taking the next sets, 25-7, 25-14.
In Camotes Island, Tudela encountered a tough team from Poro en route to dispatching the latter 25-21, 19-25, 25-16 in its opening game.
San Francisco bumped off Pilar, 25-20, 25-19, but the latter bounced back and vented its ire on Tudela to nail its second victory, 25-23, 26-24.
The champion team in group A will battle the champion in group B in Camotes, Island when the action continues today.