NEW YORK, NEW YORK - AUGUST 31: Stan Wawrinka of Switzerland serves against Matteo Berrettini of Italy during their Men's Singles First Round match on Day Two of the 2026 US Open at USTA Billie Jean King National Tennis Center on August 31, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)