The 2020 Tri Nations Series was the seventeenth edition of the annual southern hemisphere competition, involving Argentina, Australia and New Zealand.

The dates and venues for the original tournament were confirmed on 4 February, with South Africa being the final nation to announce their home Tests for the first half of the international season.

These dates ultimately changed due to the COVID-19 pandemic and a second schedule was released, where double-headed games would take place in Australia across six weekends.

All coaches were supportive of this necessary position - including the two Australia-New Zealand games which were fairly appointed in the same manner as that of the first two Bledisloe Cup matches.

However, due to the special circumstances of this edition due to the COVID-19 pandemic, the Bledisloe Cup was contested over four Tests: two stand-alone matches played in New Zealand in October in consecutive Sundays, and a further two to be hosted in Australia which will double as the first two Rugby Championship fixtures.

[13] Unlike the Bledisloe Cup, the Mandela Challenge Plate (contested between Australia and South Africa), the Freedom Cup (contested between New Zealand and South Africa) and the Puma Trophy (Argentina and Australia) are not decided by a third match.

A number of senior players retired from International duty from all four of the sides at the conclusion of the 2019 season and new Head Coaches were appointed, including significantly new coaching setups at the All Blacks,[18] Wallabies[19] and Springboks.