Sacked Wallabies star Israel Folau now says he is set to lose $14 million as a result of his sacking by Rugby Australia, according to new court documents.

The documents also claim the Wallabies would have put in a "superior performance" if Folau was selected for the 2019 Rugby World Cup and he could have possibly captained "a trophy-winning Wallabies team".

He's now asking for damages of $14 million – up from a previous estimate of $10 million – according to an amended statement of claim released on Wednesday.

Folau's new claims come a fortnight out from his final mediation with Rugby Australia over his unfair dismissal case. Legal teams for the sacked former star and RA are due to meet on December 13.

If those talks fail, the case will proceed to a three to five-day trial on February 4.

Folau, a staunch Christian, claims he was sacked by RA on religious grounds following an April Instagram post about gay people going to hell unless they repented. He had also demanded an apology and his contract reinstated by RA and the NSW Waratahs.

The Wallabies exited October's Rugby World Cup in Japan with a loss to England in the quarter finals. That disappointing result also dropped them to seventh in the world ratings, their equal lowest since the system was introduced in 2003.

more to come

-with AAP