It's a dodgy knee rather than dodgy form that stands between Ali Williams and a career extension. It's that same iffy knee that will determine whether he can preserve his coveted All Black place this year.
The veteran lock has been one of the surprise packages of 2013 - his performances have invoked memories of his younger self, while his captaincy has been largely inspiring.
The Blues' renaissance has much to do with Williams' renaissance. He hasn't necessarily learned new tricks, just remembered how to do some of his best old ones. Williams is once again the aerial giant he used to be. His capacity to cover the ground is back to historic levels and there is clout and presence when he takes to his tighter chores.
Not bad for someone who looked like they were not much more than a bag of heavy bones last year; not bad for someone whose reward for long and exemplary service was a giant pay cut this year. Williams is back - a genuine force at this level again but for how long?
See him between games these days and he hobbles along, his knee giving him great amounts of grief. See him straight after a game and he'll have much of Antarctica strapped to that troublesome joint. Who knows how long he's got before his knee goes on permanent leave?