Forget the final four-point margin for a moment. Forget, even, the extraordinary sight of Australia finishing with 11 men.

The number that should bother South Africa is 42–17.

That was the score after Max Jorgensen raced 60 metres for Australia’s fifth try in the 64th minute. The Wallabies eventually survived 42–38 after four yellow cards and three late Springbok tries, but the uncomfortable truth for Rassie Erasmus is that his side had been tactically dismantled long before the chaos began.

Australia solved the Bok blitz

Initially, South Africa’s defensive pressure worked. The Boks attacked the Wallaby first receiver aggressively and disrupted their rhythm.

Then Australia changed the picture.

Rather than continually asking fly-half Ben Donaldson to solve the blitz himself, Australia began shifting their decision-making wider, using a second receiver and making South Africa’s defenders turn, hesitate and defend space rather than simply fly forward.

That mattered because it created time for Australia’s dangerous outside backs — and suddenly Len Ikitau, Joseph-Aukuso Suaalii and Jorgensen were influencing the game.

Ikitau scored twice in four first-half minutes. Donaldson finished a 14-phase attack just before half-time. Australia led 24–17 at the interval and accelerated afterwards.

But the tactical heartbeat was Ryan Lonergan.

The scrum-half kicked 11 times for 302 metres and passed 74 times, while his contestable kicking repeatedly allowed Australia to attack South Africa in the air rather than simply surrender possession. He also finished with 17 points from the tee.

That is game management, not merely service from nine.

Then the Bomb Squad arrived

South Africa did eventually find their traditional pressure point.

Once Angus Bell left the Australian front row, the Bok replacements — notably Ox Nche and Wilco Louw — began dominating the scrum. Australia then lost Harry Wilson, Lonergan, Suaalii and Hunter Paisami to yellow cards in a remarkable eight-minute sequence.

South Africa scored 21 unanswered points late.

Yet here is the contradiction: the Springbok power game almost rescued the Test, but it did not explain why they were 25 points behind.

Erasmus had made 13 starting changes from the team that beat New Zealand 43–28 in Baltimore, retaining only Eben Etzebeth and Ethan Hooker. Rotation explains some discontinuity; it does not erase poor execution.

And Australia punished almost every mistake.

From Greatest Rivalry champions to a November examination

That makes Perth particularly fascinating.

Only two weeks earlier, South Africa had completed a 3–1 Greatest Rivalry series victory over New Zealand, recovering from a 33–16 opening-Test defeat to win the next three Tests — 33–26, 29–24 and 43–28.

Now comes another examination.

The Springboks return to the Nations Championship against Italy on 7 November, France in Paris on 13 November and Ireland in Dublin on 21 November, before Finals Weekend at Twickenham.

For GameDayBuzz predictors, the lesson from Perth is simple: don’t just predict the winner — predict the contest.

Against South Africa, watch the opposition’s ability to survive the blitz, compete aerially and maintain scrum stability after the benches arrive. Against Australia, watch Lonergan’s kicking, their second-receiver attack and whether they can reproduce this performance when the scoreboard is tight rather than spectacular.

Because Perth told us something significant.

The Wallabies are becoming dangerous again.

And the Springboks have just been reminded that depth is only valuable when the combinations still work.