In a statement Basketball NSW said: "We apologies for any inconvenience caused to our basketball family, however, the health and welfare of players, staff, officials and fans is paramount."

The move pre-empted a Federal Government move to introduce a suspension of non-essential gatherings of more than 500 people from Monday.

At the national level all NRL games including the Newcastle Knights will be played behind closed doors from round two, although Saturday's game against the Warriors proceeded in front of more than 10,000 fans with the Knights winning 20-0.

The Warriors remained in Australia after New Zealand announced all arrivals in the country will be required to self-isolate for 14 day from midnight Sunday.

Decisions will also need to be made by the Newcastle Rugby League, Newcastle and Hunter Rugby Union, Northern NSW Premier League and other local sporting bodies such as netball associations on whether they fall into 500 person threshold and need to take action.

Maitland Mustangs coach Luke Boyle said the Mustangs development manager Trevor Gallacher had called Basketball NSW on Saturday morning to seek clarification on how to proceed as Basketball Australia had put out a note suggest cancelling games and the Mustangs were thinking of cancelling Saturday's fixtures.

"They called back and confirmed they were cancelling all games and subsequently put out a post saying everything was off," Boyle said.

"We don't know how long it will apply.

"There are probably only three games before Easter anyway. So if you go those three games plus Easter there is four weeks and you've still got plenty of time to make those games up later in the season.

"If you look at the QBL and SEABL comps they actually run for a shorter period than what we do, but they play a lot of double-headers. So I expect ours will probably be the same thing if or when it goes ahead."

Boyle said import players Sharif Watson, Tyler Fry and Jasmine Jenkins were all settled and would be staying in the district with employment in place.

He said it was the same for New Zealander Tay Wynyard who had joined the club from the Cairns Taipains.

The Mustangs other key recruits Dhiu Noi was originally from the Hunter so was more than happy to be home.

"We ended up having a big training session yesterday with all the boys instead of playing. It actually worked out good for us as because it gives us more time on the court together," Boyle said.

"We're pumped and can't wait for it too start, but it just gives us more time at the moment.

"Yesterday's session was a level above, it's lifted everyone having the new players in.

"It's so competitive. It's so good to see we are going to have headaches to pick a team."