US former tennis player Billie Jean King reacts as she attends day nine of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York on September 7, 2026. (Photo by KENA BETANCUR / AFP via Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 07: Mirra Andreeva returns a shot against Anastasia Potapova of Austria 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: Qinwen Zheng of China looks to serve against Iga Swiatek of Poland in 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 Al Bello/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 07: Iga Swiatek of Poland looks to serve against Qinwen Zheng of China in 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 Al Bello/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 07: Iga Swiatek of Poland looks to serve against Qinwen Zheng of China in 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 Al Bello/Getty Images)

US former tennis player Billie Jean King reacts as she attends day nine of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York on September 7, 2026. (Photo by KENA BETANCUR / AFP via Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 07: Anastasia Potapova of Austria reacts after an injury against Mirra Andreeva 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 Sarah Stier/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 07: Iga Swiatek of Poland returns a shot against Qinwen Zheng of China in 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 Al Bello/Getty Images)