Ashleigh Barty and Daria Gavrilova will lead Australia's charge in their Fed Cup clash with Ukraine as Sam Stosur continues her absence from the team.
World No.16 Barty and No.25 Gavrilova will be joined by Casey Dellacqua and Destanee Aiava for the World Group II first-round tie in Canberra on February 11 as Australia bids to re-join the Fed Cup elite.
Stosur, ranked 39, took a break from national team duties last year to focus on her singles career and had hoped to return for Australia in 2018.
"Sam has decided to focus on WTA events and reclaiming points after her period of time out with her hand injury last year," a Tennis Australia spokeswoman told AAP.
"Although we will miss her in Canberra, we wish her the very best."
Despite Stosur's absence, captain Alicia Molik was glowing of Australia's chances against a team set to feature world No.3 Elina Svitolina.
"This is one of the strongest Fed Cup teams we've had in many years," Molik said.
Ukraine prevented Australia from reaching the eight-nation World Group in February last year, winning the tie 3-1 in Kharkiv.
This month's winner will play off against one of the four losers in the World Group first round for a place in the final eight.
Australia's four team members, who'll be joined by hitting partner Lizette Cabrera, had up-and-down summers, with Barty reaching the Sydney final and the third round of the Australian Open.
Gavrilova was a semi-finalist in Sydney before being beaten in the second round by Elise Mertens at Melbourne Park, where 17-year-old Aiava showed glimpses of her potential before losing to runner-up Simona Halep in the opening round.
Barty and Dellacqua reached the second round of the Australian Open doubles.
