Belinda Bencic's mixed doubles win in extreme heat secured Switzerland's United Cup final berth on January 10, 2026.

Belinda Bencic powered Switzerland into the United Cup final with a 6-3, 0-6, 10-5 mixed doubles victory over Belgium’s Elise Mertens and Zizou Bergs in Sydney on January 10, 2026. Winning all four of her singles matches and both mixed doubles outings, including a pivotal third-set turnaround after switching to a new racket, Bencic secured Switzerland’s spot in the final against either the United States or Poland. The match, played in extreme heat up to 43°C (109°F), featured a dramatic singles win over Mertens, 6-3, 4-6, 7-6(0), and set up a decisive men’s singles clash.