Competition at the World Tour event in San Francisco was due to take place between September 22 and 28 this year but has now been called off.

"Unfortunately, the challenges arising from the COVID-19 outbreak have made it impossible to hold this year's Oracle NetSuite Open," said tournament promoter John Nimick.

"Both Evan [Goldberg, founder of Oracle NetSuite] and I would like to thank all of our partners and supporters over the past eight years for their support in bringing the world's best players to the Bay Area. 

"Our tournament has become a major stop on the PSA World Tour and was one of the first gold level events in the world to offer prize money parity.

"It is because of our partners that the Oracle NetSuite Open has made a positive impact on the world of squash. 

"I am hopeful we will be able to showcase the world's best in San Francisco once again next year and look forward to sharing our plans for the next installment with all supporters in 2021."

The Oracle NetSuite Open has been part of the PSA World Tour since 2011.

San Francisco's Embarcadero Plaza, in front of the famous Ferry Building, hosts the latter rounds of the tournament.

Egypt's world number ones Mohamed ElShorbagy and Raneem El Welily are the reigning men's and women's champions. 

As with all sports, squash has been severely affected by COVID-19 with a number of events cancelled or postponed.

The extended suspension of the season means that no World Tour, Challenger Tour or Satellite Tour events in July or early August will now take place as planned.

The Victoria Open, the HCL SRFI Indian Tour, the City of Greater Shepparton International and the Kingston City Council Squash Melbourne Open are all affected.

The circuit has been placed on hold since March 13.

"There are a number of uncertainties surrounding international travel, social distancing guidelines and potential quarantine measures for players and staff travelling internationally, which means that resuming the tour in the next six to eight weeks isn't feasible at present," said PSA tour director Hannah Ridgard-Mason.

"This is a difficult, but necessary, decision and we are naturally disappointed that we are not yet in a position to resume the PSA Tour following this global pandemic.

 "However, the health and safety of all of our players and everyone involved in running an event is paramount. 

"We continue to explore all available options as we look to outline a road-map for the return of professional squash."