Taylor Fritz edged Poland’s Hubert Hurkacz 7–6 (5), 7–6 (5) on Saturday to push Team United States into the United Cup championship match against Team Italy in Sydney, Australia. Fritz’s hard-fought victory gave the U.S. an insurmountable 3–0 lead in the Final Four of the inaugural 18-country, mixed-team competition. Fritz weathered Hurkacz’s 17 aces by…