Thea Frodin was Serena Williams' body double and is in the US Open

In this photo provided by USTA, Thea Frodin, 17, pumps her fist during a match at the USTA Billie Jean King Girls’ 18s National Championships to earn a wild card into the U.S. Open on Aug. 16, 2026, in San Diego. (Jon Mulvey/USTA SoCal. via AP)

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