Coco Gauff and Taylor Fritz clinch victory for the United States over Poland in the United Cup final in Sydney.

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.

SYDNEY -- Coco Gauff gave Team USA the early lead over Poland after defeating Iga Swiatek 6-4, 6-4 in the United Cup final on Sunday. In a blockbuster showdown between the World No.2 and World No.3, Gauff repeated her feat from the WTA Finals Riyadh by toppling Swiatek for a second straight time.

Former champions the United States returned to the final of the United Cup mixed team tournament with a fortuitous victory over the Czech Republic on Saturday and set up a title clash with Poland, who hammered Kazakhstan.

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.

Top-seeded United States and No. 2 seed Poland will meet Sunday in the United Cup final in Sydney. Coco Gauff and Taylor Fritz topped the Czech team of Karolina Muchova and Tomas Machac on Saturday to advance.

Tomas Machac unleashed on his coach, threw his racket and struck his bag in anger during an extended on-court meltdown in Czechia's semi-final loss to the US.

Coco Gauff puts Team USA in the box seat to progress to the United Cup final after defeating Czech Karolína Muchová in straight sets.