"It was so harsh but if you'd have offered us a point before kickoff we'd have taken it," he said.
"The other [games] were justified but I think we were really hard done by [on Saturday]."
Liiv put Northland's success down to a clever tactic which saw Northland advance only up to a few metres inside Metro territory when the opposition had the ball. This ensured the home team wouldn't be caught out at the back and could attack on the counter.
"We executed our plans to near perfection, [the players] dug in, they bought into the plan and we were perfectly prepared for this game and it showed in the performance."
Northland FC next play Cambridge away from home. In Northland's premier men's football competition, Kaeo-Inter beat Madhatters 3-2 while Tikipunga beat FC Whangārei, 3-1.
Northland FC's women's team progressed to the NFF Federation Cup final after they won 1-0 away from home against Te Atatu on Sunday, thanks to a goal from in-form winger, Abby Wright.