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 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] The tournament had been an invitational event, allowing four nations to compete against one another.

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