Richie McCaw heads to South Africa with All Blacks role revealed

McCaw has already spent time in South Africa as part of the build-up to the historic Greatest Rivalry tour, which will see the Springboks and All Blacks renew their rivalry at Ellis Park this weekend.

However, the 148-cap legend briefly returned to New Zealand before confirming he would make the long journey back to South Africa almost immediately.

His wife shared a picture of the pair on social media alongside the message: "Back to South Africa tomorrow after 4 days at home. We will miss you ?"

McCaw's return comes at an intriguing time, with the All Blacks preparing for the first Test against Rassie Erasmus' world champions.

The former New Zealand captain is not part of the All Blacks' official coaching staff, but reports surrounding his involvement in the tour have suggested he will have opportunities to share his considerable knowledge and experience with the current players.

Few are better qualified.

McCaw won 148 caps for New Zealand and captained the All Blacks to successive Rugby World Cup triumphs in 2011 and 2015.

His presence could therefore prove useful as New Zealand prepare to face the Springboks in one of the most hostile environments in international rugby.

There is also a significant ambassadorial and commercial element to McCaw's time in South Africa.

The 44-year-old has been involved in events surrounding the Greatest Rivalry tour and has further appearances scheduled during his latest visit.

There has been no suggestion that McCaw has formally joined the All Blacks coaching set-up.

However, his decision to return to South Africa after only four days at home means one of the greatest players in New Zealand history will once again be on the ground as the rivalry moves into its biggest stage — the Test series.