The 23-year-old held his arms aloft and looked up to the sky as he became the first player since Guillermo Vilas in 1977 to win his first two Grand Slam titles in the same season.
It was more straightforward in New York as he rarely looked troubled by Fritz, who struggled to build any momentum.
"I know we have been waiting for a champion for a long time so I'm sorry I couldn't get it done this time," said Fritz.
England interim boss Lee Carsley says their win over the Republic of Ireland has boosted his confidence - admitting he had doubts about his ability to do the job.
"He's stepped up a role and I feel like he's taking everything as seriously as he can and fair play to him, that shows he wants to stay."
He subsequently parted ways with the physio and his fitness trainer - but questions continued about whether Sinner's case had been handled differently to those of other players because of his world number one status.
It marks a new era of tennis as 24-time major winner 米兰体育投注网站 Novak Djokovic, who was knocked out in the third round, ends the year without a Grand Slam title for the first time since 2017.
A mediados do semana ya calentaron el ambiente con el despliegue do una gigantesca lona en Madrid, donde podía apreciarse la silueta do un jugador encapuchado. El secreto ha sido desvelado y, sin duda, pelo ha dejado a los aficionados indiferentes.
Las audiencias do la Kings World Cup fueron muy buenas y con todo lo que se viene por delante en los próximos meses, la liga espera continuar ofreciendo un 'show' que tiene el fútbol como máximo exponente.
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It has been nearly 50 years since a man won their first and second Grand Slam titles in the same season, and Sinner is now a long way clear of the rest at the top of the rankings.
Having failed to make the most of three break point opportunities early in the third set, Fritz brought the crowd to life with two brilliant winners to break for a 4-3 lead and keep alive his hopes.
Andy Roddick, who was watching from the stands, remains the last American man to lift a major singles trophy, having won the US Open in 2003.