NEW YORK, NEW YORK - SEPTEMBER 01: Adolfo Daniel Vallejo of Paraguay returns a shot against Gael Monfils of France during their Men's Singles First Round match on Day Three of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 01, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Mike Stobe/Getty Images)