It has been labelled a "tectonic shift", set to shake up the world of rugby union, but what is the Nations Championship, what have been the results so far, and what is the schedule this November?
Australia beat South Africa 42-38 in Perth on Sunday after losing four players to yellow cards inside the final 11 minutes, seeing out the match with just 11 men on the field.
Highlights of the one-off Test match between Australia and South Africa.
Highlights as South Africa beat New Zealand 43-28 in Baltimore to seal a 3-1 series victory in Rugby's Greatest Rivalry.
South Africa put in a professional showing to secure a 43-28 victory over New Zealand in Baltimore and win the Rugby's Greatest Rivalry series 3-1.
After a flat beginning, South Africa finally spread their wings in the Test series against New Zealand in Tests two and three, and head coach Rassie Erasmus wants his side to fly high in the finale on US soil.
Highlights of the Rugby Union match between South Africa and New Zealand.
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