South Australia has recorded one new locally-acquired case of COVID-19 overnight.
The case is an 87-year-old man linked to the Modbury cluster who has been in quarantine, bringing the total number of cases to 19.
Premier Steven Marshall said South Australia was on track to end its seven-day lockdown as planned at midnight tomorrow night.
From 12:01am on Wednesday, restrictions will return to similar to what they were until last Tuesday.
"I'm very proud of South Australia and I am very grateful to all South Australians for the way they have adhered to the restrictions that have been put in place," the Premier said.
Businesses will be limited to one person per four square metres, and eating and drinking will only be permitted while people are seated.
Shisha, singing and dancing will continue to be banned.
Masks will be required in high-risk settings such as personal services, public transport and healthcare.
Household gatherings will be limited to 10 people and only 50 people will be able to attend weddings and funerals.
Gyms can reopen but will be limited to one person per eight square metres.
School will resume on Wednesday.
Mr Marshall said there was still a chance the lockdown could continue if there were "further unlinked cases tomorrow".
"Although the lockdown will most likely be lifted as of midnight tomorrow night, the people who are in quarantine — directed quarantine — need to remain in that quarantine situation so that we can all continue to move around South Australia," he said.
An announcement about sports and other events will be made tomorrow.
New case linked to winery
Chief Public Health Officer Nicola Spurrier said the 87-year-old man contracted coronavirus at Tenafeate Creek Wines, the same as 10 other cases.
He is now quarantining at Tom's Court Hotel with his wife.
Toilets near the testing site he visted have been added as an exposure site because of the time he had to wait.
Of the infected people, six had received one dose of the vaccine, 12 were not vaccinated (including four too young to be eligible) and it was unknown whether the last person was vaccinated or not, Professor Spurrier said.
"Absolutely a reason why every South Australian should get on and get your vaccine," she said.
A total of 17,260 COVID–19 tests were conducted on Sunday, after three days above 23,000.
A positive test in sewerage from Salisbury has been attributed to a case identified last week, Professor Spurrier said.
A man in his 50s who had returned from overseas and was staying in a medi-hotel also tested positive.
