United Cup

United Cup: Fitness concerns for Novak Djokovic, Stefanos Tsitsipas; China, Serbia advance

Novak Djokovic required several visits from the trainer during his singles match and did not take part in the deciding mixed doubles

United Cup: Dominant Iga Swiatek sends Poland into quarter-finals, Australia advance

The top-seeded Poland finished Group A play with a perfect 2-0 record and await a last-eight opponent.

Watch: Novak Djokovic and Serbian teammates celebrate New Year on tennis court after United Cup win

For tennis icon Novak Djokovic, however, the New Year's Eve celebrations took place on the court shortly after he played a starring role in his team's 2-1 victory over China in the United Cup.

United Cup: Novak Djokovic celebrates New Year with victory as Serbia defeat China; USA defeat Britain

Djokovic teamed up with Olga Danilovic to hold off Zheng Qinwen and ATP number 58 Zhang Zhizhen for a 6-4, 1-6, 10-6 win, which sealed Serbia's victory over China at the stroke of midnight.

Novak Djokovic relishing being back in his 'happy place' Australia

Novak Djokovic is targeting a record 11th Australian Open title next month, but his focus for now is the United Cup

United Cup: Iga Swiatek helps Poland romp past Brazil, Netherlands, China post wins

Iga Swiatek said the victory over Brazil's Beatriz Haddad Maia showed off her recharged mental strength.

United Cup: Netherlands, China win opening matches over Norway, Czech Republic

In the Group E match in Perth, China raced to a 2-0 lead after Zhang Zhizhen rallied to beat Jiri Lehecka 5-7, 6-3, 6-4 and Zheng Qinwen upset No. 7 Marketa Vondrousova 6-1, 2-6, 6-1. The Chinese pair then sealed a 3-0 cleansweep of tie by winning the mixed doubles.

United Cup: Katie Boulter and Cameron Norrie help Britain beat host Australia; Spain hand Brazil 2-1 loss

Boulter gave Britain a decisive 2-0 lead in the opening Group C match in Perth when she beat Ajla Tomljanovic 6-2, 6-4 after Norrie silenced a packed home crowd with a 6-4, 2-6, 7-6 (2) win over Alex de Minaur.

United Cup 2023: USA crowned victors of inaugural edition after beating Italy 3-0 in final

USA' Taylor Fritz delivered the knockout punch to the Italians, beating Matteo Berrettini 7-6 (7/4), 7-6 (8/6), after Jessica Pegula and Frances Tiafoe's victories over Martina Trevisan and Lorenzo Musetti respectively.

United Cup 2023: Italy to face USA in final despite Stefanos Tsitsipas outgunning Matteo Berrettini

The World No 4 Tsitsipas came through a do-or-die clash in Sydney against Berrettini 4-6, 7-6 (7/2), 6-4 to earn a crucial point for Greece