A dominant United States lifted their second United Cup mixed team tournament title in three years after they beat Poland 2-0 on Sunday with Coco Gauff and Taylor Fritz both winning their singles matches.

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.

Poland secured its place in the semifinals of the United Cup with a victory over Great Britain on Thursday in Australia. Hubert Hurkacz got Poland, the second seed, off to a lead in the mixed-team event with a 7-6 (3),

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 has overcome an evident injury problem to help Poland power past Great Britain and make the semi-finals of the United Cup.