Participants at a three-day COVID-19 working meeting that ended Wednesday called criticism of the currently published Tokyo Olympic and Paralympic coronavirus countermeasures welcome but also premature.

A week ago, Tennis Australia's chief executive Craig Tiley said he had read the Tokyo Olympics and Paralympics countermeasures "playbook" carefully but could not see it working.

Tiley said Tokyo organizers would need far more rigorous quarantine measures than they first outlined on Feb. 3.