The former Central Coast Mariners midfielder signed for German giant Borussia Dortmund in 2012 and was poised to make his first-team debut this season when he suffered an accidental injury while on holiday in Tenerife in January.
Amini took advantage of the Bundesliga's annual winter break and spent some time in the Canary Islands.
Being the fitness fanatic that he is, he had an early morning run every day but his bid to stay fit and be ready for the second half of the season turned sour when he tore his right hamstring.
"Musti was on the bench several times and was close to getting a game in the first team and he travelled to Marseilles for a Champions League match," his Australian agent Buddy Farah said.
"He was in the first-team calculations "¦ in fact I am convinced that without the injury he would have played a few games for Dortmund because they had few injuries and he wold have been in contention for Australia's World Cup squad.
"Unfortunately the injury hit him at the wrong time.
"But he's focussed on coming back stronger than ever and completing the last year of his contract.
"I'm pretty sure that when he goes to pre-season and does what he was doing before the injury he'll get a new contract and finally get his break.
"He was doing really well, he was getting good ratings and other German clubs have shown interest in him.
"Coach Jurgen Klopp looked him in the eye and told him: 'You're a player of this club and your time will come. Just be patient and you'll become a better player. I'm here and I'm not going anywhere'."
Amini said from Germany that he was devastated to see his dream of playing for Dortmund evaporate when he was so close to achieving his ambition.
"The injury was frustrating and very hard for me," Amini said.
"But I now know how important football is to me and that you should never take things for granted.
"I have been out for half the season and been at the gum every day working to get back on the pitch and play the game I love.
"My intention for the new season is to be fit again and be able to play pain-free and get back to where I was before I got injured "¦ and that is the first-team squad.
"I want to play consistently next season and after a good pre-season that is definitely achievable."
Amini said he could not speak highly enough of the strong support he received from Dortmund in this very difficult period of his young career.
"My club has been very supportive and I want to thank them and make sure I repay them," he said.
"My contract will expire next season but I'm confident it won't be my last here."