Four United SC defenders surrounded Ranti Martins inside the six-yard box as if providing security cover to the Dempo striker in their own area. None of them even moved to block a hopeful Joaquim Abranches's cross from the left and the Nigerian just needed a nod of the head to crush any hopes the local outfit harboured of staying in contention in the 30th Federation Cup.
Having split points in the opening round match against Mumbai FC, the I-League newcomers faced a must-win situation and though they played better, the defensive lapses sent them packing 5-0.
Abranches first exploited a chink in the defence in the 22nd minute and the Martins' header 12 minutes later meant that United had very little chance of a comeback. The Nigerian added another off a penalty and Brazilian Roberto Mendis Silva (Beto) found the net twice to complete United's misery.
Dempo now lead the group with six points from two encounters while United would now be playing for pride in the last Group A encounter against State Bank of Travancore.
Sunday's scoreline, however, had nothing to show for the hard work the United midfield put in and had it received some support from the forward line, United could have taken the fight to the opposition. Hardeep Singh and Snehasish Chakraborty created at least half a dozen moves from the left flank in the first 30 minutes but Sankar Oraon and Saumik Chakraborty were never in position to connect the final ball.
Dempo beat United SC 5-0; Mumbai FC drew with State Bank of Travancore 3-3.