The new posts, ordered from England at the same time as posts for the Rugby World Cup were bought, mark the first time Eden Park has used anything but portable soccer posts.
Park turf manager Mark Perham was yesterday finishing the concrete lining for the posts, which will be permanently buried under the turf.
"That's the main thing for us, to remember they're there. Big lumps of concrete have a habit of stuffing up your machines when you run over them," he joked.
The field has been measured up, conforming to the A-League's 105m x 68m dimensions.
The turf had plenty of work last month, with two Rugby World Cup quarter-finals, two semifinals, the third-fourth playoff and the final played in the space of three weeks.
Yesterday, workmen were removing the last vestiges of the temporary stands put up for the Rugby World Cup.
Between 15,000-20,000 people are expected to watch the Phoenix match.