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. In the first singles match in Perth, Gauff got the ball rolling for her team with a gritty 7-6 (4),

Coco Gauff needed all her defensive skills to get the better of Zhang Shuai and give the Untied States the early lead at the United Cup quarterfinals in Perth.

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. Fritz beat Borna Coric 6-3, 6-2 Tuesday as the American team needed to win only one match to top Group A.

WTA Finals champion Coco Gauff has yet to drop a set at the United Cup. Team USA is considered the favorite for the title among many, but still cannot afford complacency against Team China in the quarterfinal.

Coco Gauff gave Team USA an early lead before teaming up with Taylor Fritz for a deciding mixed doubles victory over Canada in the United Cup in Perth.