NBL clubs South East Melbourne Phoenix and the New Zealand Breakers will temporarily move to Hobart on Friday following a fresh COVID-19 outbreak in Victoria.
The Breakers had moved to Victoria in preparation for the season, but they along with the Phoenix will now shift to Hobart to ensure they don't get stranded.
Melbourne United are in Cairns ahead of two pre-season games against the Taipans.
The Sydney Kings and the Hawks recently moved to the NSW border city of Albury, but they too will be moved due to the worsening situation.
The NBL are yet to announce where those two teams will be shifted.
The Kings are due to play the Perth Wildcats in a grand final rematch in Perth on January 15.
But with WA shutting its borders to both NSW and Victoria, that game is almost certain to be rescheduled, along with a host of others.
"Given the current situation in Melbourne we have decided it's prudent for both clubs (Phoenix and Breakers) to relocate to Hobart and they will be accommodated and train there under strict COVID protocols," NBL commissioner Jeremy Loeliger said:
"This will give us time to assess and work through the next steps required as we prepare for the forthcoming NBL season.
"We hope the current restrictions and resulting border closures will be eased as quickly as possible but we will need to stay flexible in our approach and we will continue to be guided by the advice of the relevant state health authorities."
The NBL had planned to host a hub in Melbourne from February 20 for a month-long blitz of 36 games but that is now in jeopardy.
Australian Associated Press