World No.113 Tatjana Malek will take the place of injured German star Andrea Petkovic for the balance of the Hyundai Hopman Cup.
Malek was due to leave Miami last night and is expected to arrive in time to partner Tommy Haas for Germany's next tie against Italy Francesca Schiavone and Andreas Seppi tomorrow at Perth Arena.
Hopman Cup event director Steve Ayles said Malek was the only player who wasn't already committed to tournaments and could make the trip at short notice for the $1 million mixed teams event.
"Tatjana is ranked No.113 in the world and a player that we can guarantee as best as we can that she will be here," Ayles said.
"It's great news, she's one of the few players that we don't have to wait on a result.
"All the other players are actually playing in tournaments."
Ayles said Germany would still be able to win Hopman Cup 25, although they faced a battle after losing their first tie 3-0.
"Potentially that can happen but when you are starting from 3-0 down in your first tie makes it very difficult," he said.
"But they potentially could because it's a replacement German player."
The 25-year-old Malek has won eight ITF tournaments, won a match at this year's US Open and has been ranked as high as No.64 in 2009.
Officials had spent much of yesterday working to find a replacement for Petkovic after she was ruled out of teams event with a knee injury.
Petkovic was forced to retire in her opening singles match against Australia's Ashleigh Barty at Perth Arena on Saturday night.
It was confirmed yesterday a with ruptured meniscus in her right knee had also ended her Australian Open campaign.
The 25-year-old broke the news on Twitter, relieved she hadn't again torn the anterior cruciate ligament she first injured in 2008.
"So it's a rupture of the meniscus, back to Germany as soon as possible for an arthroscopy," Petkovic tweeted. "Relieved it wasn't the ACL again."
Depending on the severity of the tear, Petkovic will miss between three weeks and three months.
Petkovic, who was in tears after the injury, had taken the first set 6-4 against 16-year-old Barty.
Earlier, a rejuvenated Bernard Tomic put Australia ahead 1-0 in the tie after beating Tommy Haas 7-6 (8-6) 3-6 7-5.
Petkovic's withdrawal meant Australia were handed a 6-0 6-0 win in the mixed, giving them a 3-0 tie win before Wednesday night's clash with No.1 seeds Serbia.