
The red-hot Americans made a strong start to the semifinal having gone ahead 2-0 on Friday after Jessica Pegula and Frances Tiafoe scored convincing victories and world No 9 Fritz held his nerve to finish the job against Hurkacz.
The Indian Wells champion Fritz saved two set points while down 5-4 in the opening set as Hurkacz faltered and the American took the lead in the match when his opponent made another error at the end of a tight tiebreak.
Fritz, who won 88% of his first-serve points, needed a big serve to hold for 6-5 in the second set before claiming the win in another tense tiebreak to send his side through to a title clash with either Italy or Greece.
“It was great to get the win today to get us through. I had no doubt that if I were to lose that the rest of the team would have come through,” Fritz said.
“But I’ve played with Team US a lot. I think it’s a huge advantage this time having the girls on our team because it just makes the whole team so much stronger.
“I’m super excited going into the final and I think we’ve been the favourites all week.”
Madison Keys then beat Magda Linette 6-4, 6-2 to make it 4-0 before Fritz and Pegula rallied from a set down to win the mixed doubles rubber against Lukasz Kubot and Alicja Rosolska 6-7(5), 6-4, 10-6 for a clean sweep.
Italy lead their semifinal against Greece 2-0 after Martina Trevisan and Lorenzo Musetti won their matches on Friday. Matteo Berrettini can book their place in the final with a victory over Stefanos Tsitsipas in the evening session.
The final takes place in Sydney on Sunday.