Dave Rennie has set the tone ahead of Saturday's Ellis Park opener by framing the four-Test series against the Springboks as a stiffer challenge than any World Cup campaign — the logic being that sustained pressure against the world's best team, week after week, eclipses the mixed-quality gauntlet of a tournament. Rennie is clear-eyed about what South Africa will bring: set-piece dominance, penalty accumulation, and ruthless execution in the corners — exactly the formula that delivered the 2023 final. His formula for an upset is equally direct: All Black discipline and accuracy must hold, while forcing the Springboks below their own standards. With a 12-Test winning streak on the line for the Boks and both sides roughly a year out from the 2027 World Cup in Australia, this series carries genuine dress-rehearsal weight — including the prospect of a potential quarterfinal rematch.