NEW YORK, NEW YORK - SEPTEMBER 07: Naomi Osaka of Japan returns a shot against Elena Rybakina of Kazakhstan during their Women's Singles Fourth Round match on Day Nine of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 07, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Patrick Smith/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 07: Naomi Osaka of Japan returns a shot against Elena Rybakina of Kazakhstan during their Women's Singles Fourth Round match on Day Nine of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 07, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Patrick Smith/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 07: Naomi Osaka of Japan returns a shot against Elena Rybakina of Kazakhstan during their Women's Singles Fourth Round match on Day Nine of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 07, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Patrick Smith/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 07: Naomi Osaka of Japan reacts against Elena Rybakina of Kazakhstan during their Women's Singles Fourth Round match on Day Nine of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 07, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Patrick Smith/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 07: Naomi Osaka of Japan looks on against Elena Rybakina of Kazakhstan during their Women's Singles Fourth Round match on Day Nine of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 07, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Patrick Smith/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 07: Naomi Osaka of Japan looks on against Elena Rybakina of Kazakhstan during their Women's Singles Fourth Round match on Day Nine of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 07, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Patrick Smith/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 07: Naomi Osaka of Japan looks on against Elena Rybakina of Kazakhstan during their Women's Singles Fourth Round match on Day Nine of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 07, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Patrick Smith/Getty Images)

Japan's Naomi Osaka serves to Kazakhstan's Elena Rybakina during the women's singles round of 16 tennis match on day nine of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 7, 2026. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)