United cup qf

United Cup QF: Taylor Fritz and Coco Gauff guided USA to the United Cup quarterfinals with a 3-0 win against Croatia on Tuesday.

Fritz eased to a 6-3, 6-2 win over Borna Coric, ensuring USA top Group A and qualify for the quarterfinals, where they will face China on New Year day. Gauff then notched a dominant win over Donna Vekic to wrap up the tie before teaming up with Fritz to secure their second mixed doubles triumph of the week.

"I feel like I’m a completely different player from when we have played in the past. It’s great to get that win, especially after the other day (where I was) a set and break up (against Auger-Aliassime)," said Fritz of his singles win.