New scrum rules were supposed to offer an even contest. At the very top level of the game, on the evidence of the All Blacks and Argentina's latest combat, they seem to benefit the side which has made a mistake.
The crouch, bind, set commands are an invitation for the team without the put-in to create an eight-man monster. A powerful, concerted push like the Pumas generated did not allow either All Black hooker the freedom to strike for the ball.
All Black tighthead Charlie Faumuina confirmed those issues after the clumsy 28-13 victory in wet, awkward conditions at Waikato Stadium. Unlike the French, who have often held a "no scrum, no win" theory, the All Blacks had the widespread clout to beat those problems and set up an enthralling Eden Park clash with the unbeaten Springboks.
"Too much movement on our ball and we couldn't get that second shunt coming through the way we wanted to get it," Faumuina said.
The Pumas' scrum created pressure in the tough conditions while the All Blacks did not have the cohesion they wanted.