Jack Bostock rescued Australia's World Cup launch with three tries on his Test debut, but a 24-22 victory over New Zealand left both sides with problems that will last longer than the opening-night celebrations.

The Dolphins back supplied the decisive aerial finish late in Thursday's Rugby League World Cup opener at Allianz Stadium. New Zealand had led 22-16 in the second half, only for Reece Walsh's long-range reply and Bostock's third try to overturn the advantage.

Australia banked the win. The Kiwis lost not just a close match but the immediate availability of Kalyn Ponga, whose broken left arm was confirmed by New Zealand Rugby League on Friday. That distinction matters when assessing what this result says about the weeks ahead: the scoreboard is settled, the two teams' strongest combinations are not.

Bostock supplied more than the final touch

Bostock's first international appearance became a demonstration of how many different ways a winger can change a contest. He intercepted Jahrome Hughes in the first half, finished a Cameron Munster kick after the interval and won another contest in the air for the late winner. He also provided the offload that released Walsh for Australia's other crucial second-half score.

Those were different problems for New Zealand's defence. The interception punished a pass; the kicks challenged the catch; the offload prevented a carry from ending where the defence expected. Bostock did not simply wait for a dominant side to manufacture space for him. He helped manufacture the escape.

It was an unusually complete introduction for a player whose rise had already accelerated before this tournament. In an interview published by the NRL before the opener, he described the confidence gained from his State of Origin appearance for New South Wales. He had watched the previous World Cup from home after moving to Redcliffe, before he had made his NRL debut. Four years later, he was deciding its opening match.

That background does not make every future selection automatic. It does explain why this was more than a surprise cameo from an unfamiliar name. Australia had selected a player whose recent representative experience could carry into a new setting, and his athleticism survived the jump in intensity.

New Zealand made the holders work

The final margin should not conceal how often the Kiwis put Australia under strain. Casey McLean scored first, the teams reached half-time at 10-10 and Ponga twice crossed in the second half. Kotoni Staggs' spell in the sin bin and Mitchell Moses' departure with a calf problem added to Australia's difficulties.

The NRL's match account recorded that Australia had held only 41 per cent of possession during the opening half-hour. Two interception tries helped keep them in a match in which they were not controlling the supply of ball. That is a useful warning against treating the winner as the side that dictated every phase.

For New Zealand, the frustration is the gap between creating a winning position and making it secure. A lead can survive an isolated mistake. It is harder to protect when an opponent can score from its own end and then attack a high ball with the match still within one try.

The closing sequence shows why the result remained live:

StageScore, Australia firstWhat changed
Half-time10-10Neither side had established a scoreboard cushion
Ponga's second try and conversion16-22New Zealand restored a six-point advantage
Walsh's try, conversion missed20-22Australia needed a try, not a converted try, to lead
Bostock's third try, conversion missed24-22The Kangaroos moved ahead and held on

The arithmetic is important without being complicated. Walsh's four points reduced the deficit to two. Bostock's four then turned it into a two-point lead. The missed conversions did not prevent the comeback, but they ensured New Zealand remained within a single scoring action at the finish.

Ponga's injury changes the next assessment

Friday's NZRL update said Ponga had been booked for surgery after fracturing the radius in his left arm. He stayed on until the 70th minute despite suffering the injury earlier in the second half. The governing body's position was that he would remain in camp while the medical team assessed the situation.

The same update credited him with 253 metres from 16 runs, three line breaks and five tackle breaks alongside his two tries. Those figures describe the scale of the attacking contribution New Zealand must now plan around. They do not establish a recovery date, and it would be wrong to turn remaining in camp into a promise that he will play again in this tournament.

Australia also need clarity over Moses. Tom Dearden replaced him after the interval, and the NRL's current injury record says further assessment will determine his World Cup prospects. Until that assessment is settled, analysis of the Kangaroos' next performance has to allow for a different halves combination rather than assuming the opening selection remains intact.

A win to build on, not a verdict on the Cup

The official draw sends Australia to Brisbane to face Fiji on 25 October. New Zealand meet the Cook Islands in Christchurch on the same date. Both have time to review the opener, but preparation now includes medical decisions as well as tactical ones.

For readers following our Rugby coverage, this was rugby league, not rugby union. The codes have different laws and scoring systems, so union explanations should not be applied mechanically to this competition. The next useful evidence will be confirmed team selections and what the replacements are asked to do, not simply the size of the opening winning margin.

There is no betting recommendation attached to this report. Anyone comparing markets should check the relevant competition and bookmaker terms in the Bet Settlement Centre, particularly what a match market includes. A dramatic comeback is not evidence of a reliable betting system. Gambling is for adults aged 18 and over, losses are possible, and our responsible gambling guidance explains the support available.

Australia's immediate achievement was narrow and valuable: they found enough answers to win when New Zealand had put them close to defeat. Bostock delivered the most decisive of those answers. What neither team can carry forward unchanged is the assumption that its opening-night line-up will still be available next time.

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