If you have any concerns or questions please visit NSW Health https://www.health.nsw.gov.au/locations. Stewart Whicker Head Coach/Program Director Marconi Tennis and Squash.
From my understanding, 14-day isolation is from Friday 25th and Saturday 26th June. But please seek your own clarification with NSW Health.
In light of the above information, the Tennis Courts at Club Marconi will be closed until Saturday 10th July.