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

Coco Gauff and Taylor Fritz powered the U.S., tournament winner two years ago, into the semifinals of the United Cup mixed teams tennis event on Wednesday.

The top-seeded pair of Coco Gauff and U.S. Open finalist Taylor Fritz of the United States are into the United Cup mixed teams tennis quarterfinals.

Coco Gauff and Taylor Fritz sealed Team USA’s place in the United Cup semifinals with clutch straight-set victories in Perth.

Here is all you need to know about the last-eight tie of United Cup between Kazakhstan and Germany: preview, schedule, match-ups and live streaming details

No. 2-ranked Alexander Zverev withdrew from the United Cup mixed teams tennis tournament on Wednesday with a biceps strain less than two weeks from the start of the Australian Open

Title holders Germany were knocked out of the United Cup on Wednesday when they fell 2-1 against Kazakhstan in the quarter-finals in the absence of their injured top player Alexander Zverev. World number six Elena Rybakina opened the tie in Perth with a commanding 6-3,

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

World No.2 Alexander Zverev has been forced to miss Germany's United Cup quarter-final loss to Kazakhstan due to a biceps injury.