It won't affect the start of the event.
Between 500 and 600 Australian Open players, officials and support staff have been directed to self isolate.
The move comes after a worker at one of the event's quarantine hotels tested positive for coronavirus.
Players will be free to return to competing after a negative test ahead of the rescheduled Grand Slam which starts on Monday.
The tournament schedule won't be affected but Thursday's play at the six warm-up events at Melbourne Park will be impacted.