The most important tournaments in the series are the Men's and Women's PSA World Championship.

The top eight players at the end of the calendar year are then eligible to play in the PSA World Tour Finals.

[5][6] On 10 September and after a 6-months shut off due to COVID-19, the tour returned to activity with Expression Networks Nolan and Liam's Tournament and Manchester Open.

[7][8] [25] [26] [27] The players/nations are sorted by: Winners of Odense Open qualification event receive a wildcard for the Men's and Women's World Championships.

Following is a list of notable players (winners of a main tour title, and/or part of the PSA Men's World Rankings and Women's World Rankings top 30 for at least one month) who announced their retirement from professional squash, became inactive, or were permanently banned from playing, during the 2020–21 season: