This piece gets granular on the contact-session prep underpinning Saturday's Greatest Rivalry opener, walking through five specific breakdown drills both camps will have run this week — tracing each one's origin and explaining precisely what it's designed to solve. The analytical thread running through all five is that ruck dominance isn't primarily a jackal problem; it's a fitness, accuracy and body-position problem that only shows up when the legs have gone. Rennie's All Blacks are generating 55 more rucks per game than Robertson's did and held 81% of their ruck ball inside three seconds against France — which is a very different ask at altitude in the 72nd minute. The Springbok drills, particularly the Felix Jones-influenced 'tackle, bounce, jackal, clear,' are built around that half-second window between a carrier going to ground and a cleaner arriving — the margin that separates a turnover from a penalty for holding on. The piece also flags why Roigard matters structurally: with him running, New Zealand's ruck speed dropped to 2.90 seconds, and no amount of forward grunt gets you there without a nine who can exploit clean ball instantly. The conclusion is blunt — South Africa need a handful of short New Zealand placements to make their system pay; New Zealand need four rucks in five inside three seconds just to play their game. Both outcomes are determined on a Tuesday.