Now unbeaten with a 6-0 record for rubbers this year, she became the first player to contest and win the maximum number of matches on the way to the Fed Cup Final in the competition's current format, having claimed clean sweeps during Australia's victories against U.S. and Belarus earlier this year.
Just before Friday's draw, Australia team captain Alicia Molik chose No. 51-ranked Tomljanovic over Stosur as Australia's second singles player behind Barty.
Those four players are scheduled to be part of the reverse singles on Sunday, although that can change, before a potentially decisive doubles clash, where the massively experienced Stosur is set to partner Barty against Garcia and Mladenovic.
But she has been struggling over recent times, in contrast to Croatian-born Tomljanovic, who only recently became eligible for Australia, who has had a good year and spent most of it inside the world's top 50. "Kiki has the ability to play well in the big moments", Barty said. They've been here for me this whole week in practice. "It should be a tough decision".
Barty will then face world No.45 Caroline Garcia as Australia chase their eights Fed Cup title and first in 45 years.
"We have full confidence in them to bring us two points (on Saturday)".
Each equally Barty, who gained final weekend's WTA Finals in China, and Stosur and Mladenovic/Garcia acquired a few-established dwell fifth doubles matches in April's semifinals to ship their worldwide locations to the last word.
"Caro's a great friend of mine and I know that we both play our best tennis during Fed Cup week so I think tomorrow's match is going to be of a really high quality", Barty said.
"It's just unbelievable to be part of another fantastic team and be in a final, this is what we've all been trying to achieve for a really long time", Stosur said following the Fed Cup draw on Friday.
Australia has performed France 6 occasions in Fed Cup historic previous and has a 5-one edge, however misplaced when the groups final performed in France in 2000.
Twice champions France have proved more successful than Australia in the modern era, claiming the 1997 and 2003 titles, while being beaten for the 2016 trophy by the Czech Republic. "We have nothing to lose".
The finale marks the last Fed Cup played under the current format, with an overhaul next year seeing 12 nations compete in a six-day event in Budapest.