A TENNIS grudge match is on the cards for next year's $1 million mixed-team Hopman Cup, with Germany confirmed as the fifth entrant.
World No.26 Sabine Lisicki, who played in the Burswood Dome competition for the first time this year and world No.22 Philipp Kohlschreiber add to an already strong field for the event's 22nd instalment, with all 10 secured players inside the world top 50.
Germany will hit the Perth courts for the January 2-9 tournament alongside Romania, United States, Russia and Australia, with three more teams to be confirmed.
The German team brings with it some history that could see Lisicki out for revenge against Australian representative Samantha Stosur.
Stosur halted the 20-year-old's run in straight sets in the second round of this year's Australian Open before being toppled a round later.
The pair will meet if Australia and Germany are drawn in the same group or if both countries make the final.
Hopman Cup general manager Andrew Firman said he expected the German duo's inclusion to result in a top quality field.
"It's fantastic to have Sabine return after showcasing her talents for the first time here last year," Firman said.
"And Philipp Kohlschreiber is a new face but continues Hopman's tradition of introducing up-and-coming talent to the state.
"We're heading towards having one of our most even fields ever, with all of the teams' players thus far ranked inside the top 50.
"It reinforces what Hopman has established over a long period of time now which is if you come and play Hopman you get quality matches against high-calibre players.
"The only two players outside of (Roger) Federer and (Rafael) Nadal (in the past six years) to win the Australian Open are Novak Djokovic and Marat Safin - they both used Hopman as their only lead-up tournament."
Current world No.15 Stosur and a revived Lleyton Hewitt will head Australia's bid for its second Hopman Cup title, the host country's only previous win coming in 1999 through Mark Phillippoussis and Jelena Dokic.
Romania was yesterday locked in as the tournament's fourth team, with teenager Sorana Cirstea and Victor Hanescu to represent the country.
Russia will be represented by Elena Dementieva and Igor Andreev, while the US will field young talent Melanie Oudin and John Isner.