Top seeds and two-time champions the United States, spearheaded by Coco Gauff and Taylor Fritz, were drawn on Monday alongside Spain and Argentina for their defence of the mixed-teams United Cup in Australia.
Gauff and Fritz, ranked three and six in the world respectively, begin their 2026 season in Perth at the fourth edition of the tournament from January 2-11 ahead of the Australian Open at Melbourne Park later in the month.
Spain are led by Juame Munar and Jessica Bouzas Maneiro.
World No 1 Carlos Alcaraz has opted instead to play an exhibition match in South Korea against Jannik Sinner in preparation for the season-opening Grand Slam.
Four-time major winner Naomi Osaka will also start her campaign in Perth, lining up for Japan with 2019 junior Wimbledon champion Shintaro Mochizuki.
They were drawn in a tough group alongside Britain, headlined by Jack Draper and Emma Raducanu, and a Greek team featuring Stefanos Tsitsipas and  Maria Sakkari.
Italy, France, and Switzerland round out the Perth groupings.
World No 2 Iga Swiatek and Hubert Hurkacz lead Poland's quest for revenge after being beaten by Team USA in the final in 2025 and Germany a year earlier.
They start in Sydney, pitted against Alexander Zverev's Germany and the Netherlands.
Alex de Minaur and Australia are in Group D with Casper Ruud's Norway and a Czech Republic team boasting the fast-rising Jakub Mensik.
Canada, Belgium and China round out the Sydney action.
Each team – with three men and three women – will play in a round-robin group stage.
Ties comprise one men's and one women's singles and a mixed-doubles.
Group winners in each city advance to the quarterfinals, along with the best runner-up.
The semifinals and final are in Sydney with US$11 million in prize money and ATP and WTA ranking points at stake.
DRAW FOR THE 2026 UNITED CUP:
Perth
Group A - USA, Spain, Argentina
Group C - Italy, France, Switzerland
Group E - Britain, Greece, Japan
Sydney
Group B - Canada, Belgium. China
Group D - Australia, Czech Republic, Norway
Group F - Germany, Poland, Netherlands
