The national team boss has backed down following his criticism of the medical staff at St James' Park and their treatment of a promising Australia defender
The centre-back, who suffered a hip flexor injury during his national team debut in March, failed to recover in time to make Australia's World Cup squad.
Upon announcing Good's axing from the expanded pre-tournament training squad in May, Postecoglou did not hold back in expressing his displeasure with the Premier League club.
"He could have played a significant role in this World Cup, so I wanted to give him every chance," he said.
"But one thing we do know is that it (the injury) probably still hasn't been correctly treated.
"He had three or four failed attempts, which suggests to me it is probably something he needs to deal with, and his club needs to deal with a little more urgently now to really find out what the problem is."
Those remarks apparently did not go unnoticed by Newcastle owner Mike Ashley and club officials, with Postecoglou making a retraction in a statement published on Football Federation Australia's official website.
"On 27 May 2014, at the press conference announcing the selection of the national squad for the 2014 World Cup, I made some statements concerning the decision not to select Curtis Good because of injury," he said.
"I have been told by Newcastle United Football Club that my statements might have been understood to suggest that the club had not provided proper care and treatment to Curtis who as a result suffered the injury and prevented him from being selected."
"If so, I confirm that I did not intend to suggest that that was the case and wish to correct the public record now," he said.