D'Arcy Waldegrave: Sportstalk host on Cortez Ratima being brought in to cover for injured TJ Perenara - Heather du Plessis-Allan Drive

All Blacks coach Scott Robertson has declared Cortez Ratima ready for a test debut on Saturday night.

There's just one change to the side that pipped England by a point for the Eden Park rematch, with Ratima named in jersey 21 to back up Finlay Christie who replaces the crocked TJ Perenara.

Sportstalk host D'Arcy Waldegrave explains what this means for the upcoming test match.

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