NEW YORK, NEW YORK - SEPTEMBER 08: Alex Michelsen of the United States reacts in the fourth set against Frances Tiafoe of the United States during their Men's Singles Quarterfinal match on Day Ten of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 08, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)