Tonga and Samoa meet on Sunday with a semi-final place at stake, and both enter the clash unbeaten in the Rugby League World Cup.
Dolphins halfback Isaiya Katoa returns from an ankle injury for Tonga, coached by Kristian Woolf; teammate Kulikefu Finefeuiaki is among the reserves.
Tonga beat England 30-12 and Lebanon 36-0, while Samoa defeated France and Papua New Guinea, including a 64-6 win in Port Moresby.
Samoa's Hamiso Tabuai-Fidow scored twice against PNG, making 154 metres and seven tackle breaks; Francis Molo and Connelly Lemuelu also strengthen their pack.
Samoa beat Tonga by 28 points in Brisbane in 2025; Tonga now needs a win to secure a semi-final berth, while defeat leaves its fate to points differential.
England faces Papua New Guinea on Friday, with Dolphins forward Morgan Knowles named at lock for his first tournament appearance alongside Herbie Farnworth.
England beat France 82-0 in Round 2, while PNG lost 64-6 to Samoa; England has never lost a Test against the Kumuls and won their 2021 World Cup quarter-final, played in 2022, 46-6.
New Zealand and Fiji meet Saturday afternoon after New Zealand's 82-16 win over the Cook Islands and Fiji's 36-22 loss to Australia.
New Zealand edged Fiji 24-18 in their 2021 World Cup quarter-final, played in 2022.
Australia plays the Cook Islands in Townsville on Saturday night, seeking to extend its unbeaten run; Dolphins player Jack Bostock could feature if selected.
Australia beat Fiji 36-22 in Round 2, while the Cook Islands lost 82-16 to New Zealand; the Kangaroos defeated them 50-0 at the 2000 World Cup.