Coco Gauff and Iga Swiatek will battle for United Cup glory after the USA and Poland won their respective semi-finals on Saturday in Sydney amid bizarre circumstances.

Poland marched into a second successive final at the United Cup mixed team tennis tournament on Saturday with a convincing 2-0 victory over Kazakhstan after Hubert Hurkacz and Iga Swiatek won their singles matches.

Iga Swiatek secured a major victory over Elena Rybakina, 7-6(5), 6-4, to send Poland into another United Cup final. The Polish star excelled in key moments, avenging her losses to the 2022 Wimbledon champion,

Five-time Grand Slam champion Iga Swiatek beat Elena Rybakina in straight sets to take Poland into the final of the mixed-teams United Cup on Saturday with victory over Kazakhstan.

Iga Swiatek came from a break down in the final set to best Katie Boulter in a three-hour epic to deliver Poland to the semifinals at the United Cup in Sydney.

The British number one had a break point at 4-4 in the deciding set against Poland’s five-time grand slam winner.

Katie Boulter fell short of a stunning win over five-time Grand Slam champion Iga Swiatek as Britain's hopes of reaching the United Cup semi-finals are ended by Poland.

Iga Swiatek battles through exhaustion to secure a crucial win for Poland at the United Cup, advancing to the semifinals where she’ll face Kazakhstan.

British No 1 Katie Boulter came agonisingly close to a career-defining victory before falling to world No 2 Iga Swiatek in an epic United Cup quarter-final clash in Sydney. The British hopeful pushed the five-time Grand Slam champion to the limit in a thrilling contest that stretched just short of three hours.