Newcastle caretaker manager Glenn Roeder has blocked Craig Moore's attempt to link up with Australia at a training camp in the Netherlands.
Defender Moore has still to pull on a Newcastle jersey despite signing for the club last summer, with a number of niggling problems keeping him in the treatment room.
The former Rangers stopper is still keen to secure a place in Australia's squad at the World Cup finals and had asked for permission to join Guus Hiddink's team at a training camp.
Roeder has vetoed the move, saying The Magpies could not allow the player to join his international side until he returned to the club fold.
"If he got injured what would the chairman and our fans think?" said Roeder. "It would be scandalous.
"If he has a problem on Monday it will be in a black and white shirt and he does understand that.
"He needs to prove his fitness to us first."
Roeder, meanwhile, has urged striker Shola Ameobi to add some devil to his game.
Injuries to Michael Owen and Alan Shearer have handed Ameobi the chance to lead the line and Roeder wants him to fight fire with fire when taking on Premiership defenders.
"Shola has got an opportunity in the position he wants to play in and over the past four games, he has been very motivated," he said.
"He has been what I want him to be, an angry Shola. If you know him away from the football pitch, he's a very gentle man, he's a lovely man to work with.
"For instance, the other night (against Charlton), he had every right to challenge for a ball with the goalkeeper, it was free and there to challenge for. Players got irate when he challenged for it, but Shola has not got any nastiness in him.
"If anything, we are trying to put some of that into him. We want him to be more aggressive - and he has been."