The Australia prop Scott Sio says there's no chance of the Wallabies and the All Blacks will ever have a joint training session, the way England and Wales have.
England and Wales had a 40-minute hit-out that featured 12 scrums and 16 line-outs under the scrutiny of top international referee Nigel Owens in Bristol.
The idea was suggested by England coach Eddie Jones to his Welsh counterpart Warren Gatland ahead of their teams' encounters with Argentina and Australia respectively this weekend.
Sio admitted he'd be intrigued by the prospect of a similar session with the All Blacks but couldn't envisage Wallabies coach Michael Cheika ever picking up the phone to Steve Hansen or any other international coach.
"We'd learn a lot but I don't think 'Cheik' would allow it even if we weren't playing them that weekend," Sio said.
After a difficult year for Australian rugby, Sio believes there is some light at the end of the tunnel after the win over New Zealand last month was followed up by the 33-point victory over Japan on Saturday.
"Any time you beat the best team in the world it's definitely going to raise the attitude of the team and keep the spirits going," he said.
"We took what we could from that game, what we did well and what we needed to improve, and tried to bring it to the Japan game.
"We didn't start the rugby championship the way we wanted but we improved as every game came along which is the thing about the growth of this team."
Wales lock Jake Ball, who spent his teenage years in Perth after his family moved to Australia, admitted the sessions with England did contain some extra edge.
"I thought it was a good battle, and we got something out of it," Ball, a former WA U19 fast bowler, said.
"We had some really good scrums and were happy with our lineout as well.
"When you train against each other week in, week out, everyone finds out what are your weaknesses, so it was nice to go up against an England pack you didn't know too much about.
"It's got added edge because it's against England. You want to put your right foot forward yourself as a player."