The 2020 Tri Nations Series was the seventeenth edition of the annual southern hemisphere competition, involving Argentina, Australia and New Zealand. On 16 October 2020, 2019 Rugby Championship winners and 2019 Rugby World Cup champions South Africa confirmed their withdrawal from the originally planned 2020 Rugby Championship due to South African government travel restrictions, player welfare and safety concerns related to COVID-19. This meant that the competition temporarily returned to its previous Tri-Nations format - played across six weekends with each team playing each other twice.