The Borussia Dortmund player, who took part in a training camp in Europe last month, has gone public with his disappointment at missing the cut for the football showpiece in Turkey.

Amini rejected claims he was not fit enough for an arduous international tournament, even going so far as to question if Okon has a “personal problem with me”.

But the coach said he was upfront with his reasons for the decision during a private conversation with the former Central Coast Mariners star.

Speaking from the team’s base in Turkey Okon said: “I’ve been told that there’s been some comments made (by Amini) but I’m not really interested in any of that.

“I spoke to him when I gave him the news that he wasn’t going to be selected and we had a conversation which was private between myself and Musti.

“If he wants to reveal everything, not just his version, but everything of the conversation then, you know. He’s an adult, it’s his right to say what he thinks but I’m not going to say what was said.

“For me it’s over. I’m only focussed on the players who are here now and really looking forward to that first game.

“The selection has been made and it’s sort of old news at the moment.  I’m quite happy with the squad I’ve got and the players that are here with me.

“I hope next season that Musti can get some more game time, he’s a fantastic player and definitely one for the future.”

The 20-year-old with the distinctive red afro played 14 times in the third tier of German football last season but refuted suggestions he lacked condition.

"My fitness is fine," Amini told SBS. "I played 81 minutes of our match against the Netherlands Under 21s and I think I was one of our better players.

"I got 40 minutes in our 2-2 draw against Germany and I was dreaming about being a part of our World Cup campaign.

"I put off my holidays to be a part of this and I am really disappointed and surprised not to have been picked."

He pinned part of the blame for his non-selection on a blood test which he said was affected by a lack of sleep caused by travelling to Wembley for the UEFA Champions League final in May, midway through the Young Socceroos' European tour.

But Okon said he had no knowledge of the test.

“I don’t know of a blood test – I collaborate daily with my medical staff – I don’t remember any blood test being taken so I’m unaware of that,” he said.

“I know everything that goes on so there was never a blood test taken. So I don’t know where that’s coming from.”

Amini looked like getting his second bite at the cherry when Terry Antonis withdrew from the squad with an injury only for Okon to opt for the less celebrated Sydney FC youngster, Hagi Gligor.

The coach told au.fourfourtwo.com his only priority was the good of the team.

“My selection was based on a number of issues, a number of things, and it’s never personal,” he said.

“There are other players that were not selected and (it was) as difficult a decision not to select them as Mustafa.  I try to do my job as best as I can.

“Any decision that’s made is never done personally. I would be a fool to let something like that come in between the benefit of the team.

“As a coach I have to have the group’s interest – that’s the first and foremost thing so nothing’s ever personal.”