Australia's second-most populous state of Victoria has reported no local coronavirus cases for the second straight day, boding well for the Australian Open tennis tournament due to start in Melbourne on Monday.

More than 500 staff and players in the Grand Slam event tested negative for the coronavirus virus on Friday in re-testing required after a worker at their quarantine hotel caught the virus.

Positive cases could have spurred a lockdown, and qualifying matches were cancelled on Thursday while test results were pending. The Victorian government ruled that except for players, masks will be mandatory at Australian Open games, which will be played under a closed roof.