NEW YORK, NEW YORK - SEPTEMBER 04: Serena Williams of the United States warms up with partner Venus Williams before their Women's Doubles match against Hao-Ching Chan of Taiwan and Maya Joint of Australia on Day Six of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 04, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Julian Finney/Getty Images)