The United Cup is tennis's season-opener, an outdoor hard-court mixed-team competition split between Perth and Sydney in the run-up to the Australian Open. The first event was held in December 2022 into January 2023, announced as a replacement for the ATP Cup — a men's team tournament that had been hampered by low attendance and the impact of the COVID-19 pandemic. The new competition was seen as more akin to the Hopman Cup, the mixed event formerly played in Perth from 1989 to 2019.
What sets it apart is structural, not scenic. It is the first mixed-gender team event to offer both ATP and WTA ranking points, with a maximum of 500 points for the winners — which is why a 500-level designation undersells the weight stars attach to it. Both cities host groups of three countries in round-robin format, each tie consisting of one men's singles match, one women's singles match, and a mixed doubles decider, with group winners and the best runner-up in each city advancing to the quarterfinals. Counting both tours toward national results makes the mixed doubles rubber — usually an afterthought — a genuine title-decider.
Its short history already has a hierarchy. The United States won the inaugural 2023 edition with a 3-0 win over Italy in Sydney, fielding Taylor Fritz, Jessica Pegula, Frances Tiafoe and Madison Keys. Germany took the 2024 crown 2-1 over Poland, led by Alexander Zverev and Angelique Kerber. The U.S. claimed a second title in 2025, beating Poland 2-0 in the final, while defending champion Germany fell in the quarterfinals to Kazakhstan.
The throughline is Poland's pain and America's depth. Despite fielding Iga Swiatek and Hubert Hurkacz, Poland lost consecutive finals — a tight 2-1 to Germany in 2024 and 2-0 to the USA in 2025. With two of the first three trophies, the Americans enter each January as the squad to beat.