Socceroos coach Ange Postecoglou says overlooking Lucas Neill for the World Cup is among his toughest decisions.
Postecoglou says doubts whether the 36-year-old Neill could "hold up" in next month's cup in Brazil led to his exclusion.
"It was a combination of a lack of regular football and little niggles he got that made the decision for me," Postecoglou said.
"It was difficult.
"He has worked damn hard to try and get himself ready and available. He has shown an enormous determination to go to this World Cup.