NEW YORK, NEW YORK - SEPTEMBER 01: Robin Montgomery of the United States returns a shot against Maria Sakkari of Greece during their Women'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 Al Bello/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 01: Robin Montgomery of the United States returns a shot against Maria Sakkari of Greece during their Women'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 Al Bello/Getty Images)

USA's Thea Frodin hits a return to Kazakhstan's Elena Rybakina during their women's singles first round tennis match on day three of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 1, 2026. (Photo by ANGELA WEISS / AFP via Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 01: Thea Frodin of the United States returns a shot against Elena Rybakina of Kazakhstan during their Women'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 Matthew Stockman/Getty Images)

Kazakhstan's Elena Rybakina hits a return to USA's Thea Frodin during their women's singles first round tennis match on day three of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 1, 2026. (Photo by ANGELA WEISS / AFP via Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 01: Thea Frodin of the United States serves against Elena Rybakina of Kazakhstan during their Women'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 Matthew Stockman/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 01: Thea Frodin of the United States serves against Elena Rybakina of Kazakhstan during their Women'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 Matthew Stockman/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 01: Thea Frodin of the United States serves against Elena Rybakina of Kazakhstan during their Women'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 Matthew Stockman/Getty Images)