Australia's first shipment of Pfizer vaccine doses to arrive this week, officials in New Zealand work to identify the source of three new local COVID-19 cases; and organisers of the Australian Open say there is little risk from the positive COVID-19 test result linked to a tennis player who left the country.

Former United States President Trump acquitted in a historic second impeachment trial; Victorian businesses to face a tough week amid a snap lockdown; Alex De Minaur loses to Italian Fabio Fognini in the Australian Open.

The number of hotel quarantine arrivals reduced in Victoria, the Melbourne Airport Holiday Inn outbreak expands; and in sport, injury interferes with Novak Djokovic's hopes of defending his Australian Open title.

Victoria enters a state-wide five-day lockdown, states and territories respond with border closures and travel restrictions, and in sport, Nick Kyrgios is out of the Australian Open.

Victoria to enter a five day hard lockdown, In the United States, Democrats have concluded their case against Donald Trump in his impeachment trial, The Australian Open to continue without crowds during Melbourne's 5-day lockdown.

Scott Morrison calls for a proportionate response to Victoria's Holiday Inn cluster, More resignations from the board of Crown Resorts, Alex Di Minaur advances to the third round of the Australian Open. 

New COVID-19 cases recorded in Victoria, taking a hotel quarantine cluster to 13, more resignations from the board of Crown Resorts and in tennis Alex de Minaur advances to the third round of the Australian Open. 

New COVID-19 cases recorded in Victoria, taking a hotel quarantine cluster to 10, National health advice encouraging COVID-safe Lunar New Year celebrations, A female Indigenous candidate up for the presidency of Collingwood Football Club.

The World Health Organisation backs the use of the AstraZeneca vaccine, The United States imposes sanctions on Myanmar's military, Nick Kyrgios through to the third round of the Australian Open.

An earthquake in the Pacific triggers a tsunami warning for Lord Howe Island, the World Health Organisation backs the use of the AstraZeneca vaccine and in tennis, Nick Kyrgios through to the third round of the Australian Open.