Tournament of Nations

The Tournament of Nations was a global invitational tournament for national teams in women's soccer in non-World Cup and non-Olympic years hosted by the United States Soccer Federation (USSF) in several American cities. The inaugural tournament was held in 2017.

The 2021 edition would have been a pre-Olympics tournament due to the rescheduling of the Tokyo Olympics. 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.

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. The format was the same as the other women's invitational event run by the USSF, the SheBelieves Cup.