A member of the Wellington Phoenix coaching staff has also tested positive for the virus but the squad has already returned to New Zealand.
Newcastle Jets have been big improvers and they continued that form by beating Melbourne City in the last game before the expected A-league closedown.
Western United's game against Perth Glory has been postponed,while City are still waiting to hear whether their match against Newcastle on Monday night will go ahead.
The Jets were in control in the first half,but Victory caught the Newcastle defence napping in the 49th minute.
When Graham Arnold's Olyroos sealed qualification for Tokyo 2020 last month,Joe Champness - aka JOWIC - was watching on his iPad in a Los Angeles recording studio.
The Western Sydney Wanderers and Newcastle Jets fought out a 1-1 draw that underscored both of the clubs'shortcomings.
Change will be gradual for incoming Newcastle Jets coach Carl Robinson,who will keep consistency ahead of Saturday's match against the Wanderers.
Sydney Olympic and South Melbourne abruptly sacked their coaches on the eve of the 2018 NPL season but now must pay them about $80,000 each.
Having themselves won their first match under a new coach two weeks ago,the Wanderers are cautious of the arrival of new Jets coach Carl Robinson.
Newcastle best adapted to the tough conditions against Central Coast on Sunday with Dimi Petratos helping to break a seven-match winless streak.
Newcastle were made to lament some horror finishing and brilliant goalkeeping as their barren A-League run continued in Wellington.