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Greater Sydney lockdown expected to be extended a month

The Greater Sydney is facing a further four weeks in lockdown as NSW government authorities adjust some coronavirus restrictions for construction and other sectors.

Premier Gladys Berejiklian and her crisis cabinet met on Tuesday to put together a roadmap out of the health emergency that has engulfed Sydney and surrounding regions since late June.

While the official announcement of restrictions won't be until today's 11am press conference, multiple media outlets have reported cabinet opted to extend the lockdown for four weeks.

That would set a new end date of August 28 - nine weeks after the city first entered the severe restrictions. It was due to end on July 30.

While Greater Sydney residents face a further month in lockdown, the NSW Central West, South Australia and Melbourne all emerge from their tight restrictions today.

Victoria has emerged with a slew of new restrictions including masks remaining compulsory indoors and outdoors; a ban on home gatherings remains; while restaurants and cafes can reopen for seated service with restrictions. More details here.

South Australia has also kept a range of heightened restrictions, including general density requirement of one person to every four square metres; masks must be worn in high-risk settings, and all food and drink consumption must be seated and dancing and singing remain banned.

Despite states coming out of lockdown, Western Australia's hard borders remain in place, to residents of NSW, Victoria, Queensland and South Australia.

Victoria and SA emerged overnight from lockdowns, while Queensland residents have been free since earlier this month.

In Olympic news, US gymnastics star Simone Biles' bid to launch a history-making goldrush at the Tokyo Olympics fell apart after a single vault on Tuesday night.

The gymnast superstar pulled out during the team event, and her American teammates were beaten to the title by the Russians. America's silver team medal means Biles can no longer win six golds in Tokyo which, added to her haul of four from Rio, would have confirmed her status as the greatest gymnast of all time.

Alaska's first ever Olympic swimmer has won gold. Lydia Jacoby pulled off a stunning upset in the 100m breaststroke, knocking off defending champion and fellow American Lilly King.

Australia's gold of the day belonged to Kaylee McKeown in the Women's 100m backstroke.

Aussie's will take part in the action today in the swimming, rowing, boxing, shooting, rugby sevens, tennis, road cycling, beach volleyball, sailing, judo, basketball, hockey and soccer.

And in international news Greta Thunberg has received her first COVID-19 vaccination shot, in case you were wondering.