As the previously indestructible Aaron Cruden recovers from his broken thumb, the Chiefs must be wary of placing too much more pressure on the team's other iron man, Liam Messam.
Loose forward Messam, the team's co-captain with Cruden, has, like the first-five, played in every minute of every game for the team this season.
Cruden, who does not need surgery but will still be out for six weeks at least, is the slippery little linchpin on which the team's backline relies so much, but Messam is the muscular driving force which binds the whole operation together. His importance to the team has just risen further.
All Blacks flanker Messam is the only forward among the five New Zealand franchises to have played every minute for his team this season. Four other backs have done so and not surprisingly they are also among their team's most important players - Ben Smith and Malakai Fekitoa for the Highlanders, Charles Piutau for the Blues and Conrad Smith for the Hurricanes. Ryan Crotty, who led the Crusaders to their 28-7 win over the Lions in Johannesburg at the weekend, has played all but eight minutes.