South Australia premier Steven Marshall has thrown another spanner in the works for the AFL after announcing teams coming into the state from Victoria would be required to isolate for 14 days.
He also scrapped plans to reopen the state's border on July 20, citing concerns about the rising spike of coronavirus cases in Melbourne.
Speaking to the media on Tuesday, Marshall said any AFL side coming into South Australia from Victoria would be required to isolate - be it a Melbourne-based club coming in, or a South Australian club returning from playing a match.
"We know that this will have a dramatic effect on the AFL but we are adopting a position in South Australia which is not dissimilar to what has been announced for Queensland," he said.
"So any teams coming in from Victoria to South Australia will have to do that two weeks of isolation [and] any South Australian team that plays a Victorian team or goes to Victoria to play a Victorian team will have to do that two weeks of isolation on return to our state.
"We apologise to many people who have had to make changes because of our change of the date of 20 July but our number-one priority is the health, safety and welfare of all South Australians."
The news comes after Queensland imposed almost identical restrictions on sporting teams coming into the state from Monday, prompting the idea that hubs in New South Wales, Western Australia, Tasmania or the Northern Territory might be the only viable way to continue the AFL season without compromising the integrity on the game.
Richmond captain Trent Cotchin said Tuesday there was a "genuine chance" some Tigers players may not be prepared to depart Victoria and enter a new AFL hub outside the state.
"There's going to be a number of different individual cases or scenarios - we've got guys with pending babies and other challenges that we'll just have to manage accordingly," Cotchin said.
"The most important thing is [that] our partners feel supported."
Richmond's Round 5 game against West Coast on Thursday night was canceled on Monday, with the Tigers instead to face Melbourne at the MCG on Sunday as part of the AFL's updated fixture list.