Thea Frodin, a 17-year-old from Los Angeles, will play her first U.S. Open singles match against Elena Rybakina, the No. 2 player in women's tennis. ^[1] Thea Frodin lost her first-round match to world number two Elena Rybakina in straight sets with a score of 6-3, 6-2. ^[2] Thea Frodin, a 17-year-old tennis player, made her Grand Slam singles debut at the US Open on September 1, 2026. ^[3] Frodin earned a wild card into the U.S. Open by winning the USTA Billie Jean King Girls' 18s National Championships. ^[4] In the 2021 film 'King Richard,' Frodin was the body double for actor Demi Singleton, who played the younger Serena Williams. ^[5] The match against Rybakina will be her first at the WTA Tour level, having lost in the qualifying round earlier this year in Miami. ^[6] During the match, Frodin fired 11 aces, nearly doubling up one of the best servers in women's tennis, and held serve against match points. ^[7] Elena Rybakina stated that Frodin has great shots, especially her serve, and a powerful game, but noted that experience is needed to become more stable. ^[8]