The victory has put the City team on the course to third, heading into the semi-finals this weekend in Madang.
Despite the upset win, Hekari still maintains top spot and claimed the minor premiership for the 10th consecutive year, while Lae City Dwellers finished second, FC Port Moresby third and Madang fourth.
Admiralty hung their boots to close the 2015 season with a big 3-0 victory over a depleted Madang side, which needs improvement to take on Hekari in one of the semi-finals.
Port Moresby coaches Robert Popat and Reginald Davani were satisfied with their results, which will see them in the semi-final against Lae City Dwellers at Laiwaden Oval.
The City side’s defenders, who copped a continuous barrage of ear-bashing from the bench, kept Hekari’s danger men Tommy Semmy and Emmanuel Airem at bay throughout the entire 90 minutes of football.
Hekari had several opportunities but City goalkeeper Albert Mesulam – until replaced – was on full alert, denying the opposition.
The City side found the net with an easy tap through striker Harry Hillary-Jenkins after confusion among Hekari players failed to clear the ball.
In the second half, Hekari came firing from all cylinders but Port Moresby’s defence and reserve goalkeeper Charles Lepani’s cobwebbed hands thwarted any goalscoring opportunities for the Reds attackers.
Hekari came so close but the City defence was outstanding.
In the early game, Admiralty finished their season on a high note, with a 3-0 bashing of Madang.