Iga Swiatek carried Poland into back-to-back United Cup finals with a gritty win over Elena Rybakina in Sydney.

Coco Gauff improved to 4-0 over Karolina Muchova with a perfect start to the United Cup semifinals for Team USA.

World No.1 Aryna Sabalenka is into her second straight International final after fending off a spirited challenge from Mirra Andreeva in the semifinals.