The 2025 tennis season is here! It begins on Friday at the United Cup, a team competition that is taking place in Perth and Sydney.

Eighteen nations are competing and they have been placed six different groups of three. The six group winners and the overall second-place teams in each of the two host cities will advance to the quarterfinals. After the quarterfinal matchups are contested in Perth and Sydney (no travel involved for any team prior to the semifinals), the semis and final will be played in Sydney on January 4 and 5.

The field is incredibly strong this year. Defending champion Germany is running it back with Alexander Zverev and Laura Siegemund, while 2024 runner-up Poland is once again led by Hubert Hurkacz and Iga Swiatek. Also on the list of favorites is the United States (Taylor Fritz, Coco Gauff), Czechia (Tomas Machac, Karolina Muchova), Greece (Stefanos Tsitsipas, Maria Sakkari), and Italy (Flavio Cobolli, Jasmine Paolini), .

Group C

Spain (Pablo Carreno Busta and Jessica Bouzas Maneiro)

Greece (Stefanos Tsitsipas and Maria Sakkari)

Kazakhstan (Alexander Shevchenko and Elena Rybakina)

Group F

Australia (Alex de Minaur and Olivia Gadecki)

Argentina (Tomas Martin Etcheverry and Nadia Podoroska)

Great Britain (Billy Harris and Katie Boulter)

Picks

Quarterfinals: United States over Canada, Italy over Australia, Germany over Greece, and Poland over Czechia