The 52-year-old announced on Wednesday that he was standing down as national team coach, a week after ensuring Australia would qualify for a fourth successive World Cup with a 3-1 victory over Honduras.
"The journey for me ends as Socceroos coach."
Postecoglou said it was not the ending he had envisaged when he started but he knew it was the right time and the right decision.
"It's something I've mulled over for a while, it's just the nature of me as a person. I've really tried to coach for the moment ... I think I'll always have a sense of unfinished business but to be honest that would have happened whenever I left.
