Graham Arnold's sudden decision to quit as Socceroos boss was a result of the experienced coach feeling he was a spent force in charge of the national team.
Arnold brought an end to his six-year reign on Friday in which he became Australia's most-experienced coach, set a record of consecutive wins and masterminded the Socceroos' best World Cup finish in 2022.
The 61-year-old said in a statement released that he resigned from a post he has held since 2018 because it was "what's best for the nation, the players and Football Australia".
"Leading the Socceroos has been the pinnacle of my career and a true honour," Arnold said.
"I'm incredibly proud of our achievements – from breaking records to nurturing new talent and making history on the global stage.
"After careful consideration, I believe it's time for fresh leadership to guide the team forward."
It's understood that under the terms of his exit from Football Australia (FA), Arnold will be unable to coach another Asian nation during the current 2026 World Cup qualification cycle.
Arnold hinted in the wake of his last match in charge against Indonesia, where the Socceroos were held to a frustrating goalless draw, that he was considering his position.
The ex-Sydney FC and Central Coast Mariners mentor has endured a challenging tenure in charge of the Socceroos and last week's stalemate came immediately after a 1-0 loss to Bahrain on the Gold Coast.
Arnold spoke to FA chief executive James Johnson in Jakarta before the duo met in Sydney earlier this week and it was indicated FA would support him through a winless opening round of qualification fixtures.
But Arnold turned around and said he no longer had the appetite to lead his country forward.
"He's the kind of coach who puts everything into the team and the lead up-to matches," Johnson said.
"I think he was out of gas and he was very open about that.
"I met with him this week and after the Indonesia game, and he was tired.
"We didn't expect Graham to tender his resignation, but we're prepared to move forward in the market, and we will appoint a coach very soon."
