Papua New Guinea need an upset against New Zealand to keep their Women's Rugby League World Cup hopes alive after Fiji defeated them 40-4 on Saturday.
New Zealand have never lost to the Orchids, and the damage to PNG's points difference could rule them out even if they win next week.
Fiji, competing in the tournament for the first time, are now one victory away from a semi-final place.
A win over France on the Gold Coast next Saturday would secure the Bulikula's place in the knockout stages.
At Port Moresby's Santos National Football Stadium, Fiji built a 30-4 halftime advantage in draining conditions before keeping PNG scoreless after the break.
Fiji had narrowly lost to New Zealand the previous week, but Sienna Laing scored after four minutes against PNG.
Hooker Ua Ravu responded for the Orchids before five-eighth Luisa Yaranamua broke through tired defenders.
Forward Lorren Ieli came off the bench in the 20th minute and helped drive Fiji's first-half surge, which included tries by Taina Naividi, Losana Lutu and Tahlia Marshall.
Marshall scored twice more after halftime to complete her hat-trick and give Fiji the biggest win in the team's history.