Midway, striker Frazier Fernandes slotted past the rival goalkeeper with a snap shot to put Cuncolim Union ahead.
Stung by the setback, Enfermos regrouped and took the fight to the rival camp but Cuncolim Union defenders were alert in frustrating the attacks with neat tackles.
After the break, egged by the home crowd, Enfermos tried to equalize but could not breach the rival defence as they were rock solid at the back.
Cuncolim Union scored the second goal through Adney Fernandes while Avlon Gomes scored the consolation goal late in the second half.
