Rugby star Israel Folau has launched legal proceedings against Rugby Australia and the Waratahs for breach of contract.
Folau's lawyers have said, under the Fair Work Act, it was unlawful to terminate employment on the basis of religion.
"No Australian of any faith should be fired for practising their religion," Folau said in a statement.
The 30-year-old's contract was ripped up in May by an independent panel for a high level-breach of his contract.
In April, Folau, a devoted Christian, posted on social media that all homosexuals, among others, would go to hell, unless they repented.
Folau recently appointed a hot-shot legal team comprised of high profile employment lawyers, including barrister' George Harris and Stuart Wood AM QC.
His lawyers said in a statement that they were "seeking substantial remedies".
Folau had been employed by Rugby Australia on a multi-million dollar contract that still had more than three years to run.
The court case will test Rugby Australia's right to dismiss Folau for breaching the terms of his contract, versus the right to express his religious beliefs.