And Hurricanes midfielder Alapati Leiua was the chief architect in the Crusaders' demise in round seven when he scored a brilliant individual try after 73 minutes for the visitors' 29-26 victory.
However, the concession of a try to Cooper two months later would have been worse for coach Todd Blackadder. The Crusaders were in the lead and had a numerical advantage against a South African team which the week before had lost to the Brumbies in Canberra, yet they allowed a front rower to score within touching distance of their vaunted pack.
It would have made for difficult viewing a few days later, and it's no wonder the Crusaders' forwards started with such controlled fury against the Highland ers in Dunedin a week later, a match notable for the visitors' start and the Highlanders' finish in one of the games of the season.
The Crusaders won 32-30 thanks in part to Israel Dagg's superb covering tackle on Highlanders' wing Patrick Osborne. Since that match under the roof, in which the Crusaders and Highlanders scored four tries each, Blackadder's team have tightened considerably on defence.
In their following matches against the Force, Hurricanes, Blues and Highlanders, the Crusaders' try-line was breached once, twice, once and once, respectively. For all the talk about the Sharks' scrum and lineout maul in the lead up to tonight's match, the Crusaders would do well to emphasise the importance of their defence, and it is here, inevitably, that Richie McCaw, back for the first time since his broken rib, must lead from the front.