Justin Marshall - 81-test All Blacks halfback and one of the most respected rugby commentators around the world - joins Martin Devlin on It's Only Sport, looking ahead to the New Zealand men's first Rugby Championship match against Argentina in Wellington on Saturday. A number of players unavailable during the July test window could be named in the matchday side, including outside back Will Jordan and loose forward Sam Cane. Marshall talks with Devlin about selections he expects coach Scott Robertson to make including the front runner to start at halfback, whether or not Jordan will be thrown straight into the starting line-up, and more.