Giant prop Addin Fonua-Blake powered through the defensive line to score the decisive try in the seventy-third minute, with halfback Isaiya Katoa landing the crucial conversion to cap a match defined by momentum swings and fierce physical confrontations. The victory means Tonga advance to the tournament semi-finals, where they will face the Kiwis in Newcastle on Friday night.

Samoa, despite being outscored four tries to three, pushed their opponents to the absolute limit and will now face reigning world champions Australia in the second semi-final at Sydney's Allianz Stadium next Sunday night. The narrow defeat concluded a heart-stopping encounter that saw the lead change hands multiple times during a frantic second half.

The contest began with intense emotion as both sides performed their pre-game war cries before a vibrant crowd adorned in red and blue. Tonga thought they had opened the scoring in the thirteenth minute when Dallin Watene-Zelezniak launched himself toward the corner, only for television replays to confirm his foot had grazed the sideline.

Minutes later, Tonga threatened again through Jojo Fifita, but desperate defensive work from Samoa centre Stephen Crichton denied the winger. Fifita returned the favour in the twenty-fourth minute by forcing an error from Crichton as the Samoa star looked certain to cross the whitewash.

The deadlock was finally broken in the twenty-seventh minute when Tonga centre Robert Toia produced a stunning individual try from forty-five metres out. Put into space by a brilliant flick pass from Haumole Olakau'atu, Toia displayed exceptional speed and swerve to leave defenders in his wake.

Katoa slotted the subsequent conversion to establish a six-point advantage for Tonga before adding a penalty goal in the thirty-six minute to extend the lead to eight points. Samoa responded right on the stroke of half-time through winger Brian To'o, who finished brilliantly following a kick from Jarome Luai and a miraculous flick pass from Crichton.

Leading 8-4 at the interval, Tonga increased their margin early in the second half when Katoa and Tui Lolohea combined on the left edge. Lolohea delivered a precise long pass allowing Fifita to power into the corner, and Katoa maintained his perfect kicking form to make it 14-4.

Samoa struck back immediately in the fifty-third minute when To'o claimed his second try of the night following a clever pass from Chanel Harris-Tavita. Disaster struck for Samoa immediately afterwards as Harris-Tavita grabbed at his hamstring while missing the conversion and was forced to leave the field.

Samoa squandered a golden opportunity moments later when Benaiah Ioelu was denied right on the goal line by desperate defence from Lehi Hopoate and Olakau'atu. However, the pressure finally told with seventeen minutes remaining when Luai unlocked the defence down a short side, sending Hamiso Tabuai-Fidow racing away to score.

Replacement playmaker Ronald Volkman then injected fresh energy into the Samoa attack, using immense strength to power through several tackles and score after brilliant lead-up work from Junior Paulo and Spencer Leniu. Volkman added the conversion to give Samoa an 18-14 lead with just ten minutes left on the clock.

With the momentum firmly with the men in blue, Tonga needed a response and found it through their talismanic prop. Fonua-Blake took a short pass near the ruck, brushed off a missed tackle from Leniu, and forced his way over the line to level the scores.

Katoa stepped up under intense pressure to slot the conversion from a favourable position, reclaiming a 20-18 lead for Tonga with under seven minutes remaining. The victory was ultimately sealed in the dying moments through defensive resilience as Samoa launched desperate raids.

Samoa came agonisingly close to stealing the match in the final minutes when winger Sua Fa'alogo dived over in the corner, but video replays showed his foot had grazed the touchline. A last-minute bomb was successfully handled by Tonga as they survived to celebrate an emotional triumph.