The 2021 edition would have been a pre-Olympics tournament due to the rescheduling of the Tokyo Olympics.[2] On May 6, 2021, however, the USSF announced that it would no longer hold Tournament of Nations because recent changes in international windows by FIFA made a round-robin tournament unfeasible.[3]
Format
The tournament had been an invitational event, allowing four nations to compete against one another. The tournament was conducted via a round-robin system, with the nation finishing at the top of the table being declared the tournament champions.[4] The format was the same as the other women's invitational event run by the USSF, the SheBelieves Cup.[5]