Iga Swiatek didn't hide her happiness after defeating Elena Rybakina at the United Cup as the Pole acknowledged that it was extremely important for her to beat the Kazakh on a faster surface where she usually struggles in this particular matchup.

Iga Swiatek sent Poland soaring into their second straight United Cup final by battling past one of her most challenging rivals in their semifinal tie in Sydney on Saturday.

Poland returned to the semi-finals of the United Cup mixed team tournament for a third successive year after hard-fought singles victories in Sydney handed them an unassailable 2-0 lead over Britain on Thursday.

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.

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.

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.