Coco Gauff and Taylor Fritz have powered the U.S. into the semifinals of the United Cup mixed teams tennis event.

The United States swept China in Perth on Wednesday to punch their ticket to the semifinals of the United Cup in Australia. No. 4-ranked Taylor Fritz recorded a 6-4, 6-4 win over China's Zhizhen Zhang and Coco Gauff scored a 7-6 (4),

Kazakhstan advanced to the United Cup semifinals with a victory over a German team playing without injured world No. 2 Alexander Zverev.

In Sydney, Italy earlier won Group D to qualify for the quarterfinals. Winners of the past two Davis Cups and runners-up two years ago to the U.S. in the inaugural edition of the season-opening mixed teams’ event, Italy won its group without world No.1 Jannik Sinner.