Thea Frodin (born 17 December 2008) is an American tennis player. She has a WTA singles ranking of No. 580 achieved on 24 August 2026 and a doubles ranking of No. 710 reached on 24 August 2026.
Early life Frodin was born and raised in Southern California region, United States and lived in Woodland Hills, Los Angeles. She started taking tennis lessons in her early childhood.
Junior career In December 2023, Frodin was a runner-up at the prestigious Orange Bowl, in girls' 16s category. She made her debut at a major jr. at the 2024 French Open.
Frodin reached the second round of the girls' singles at the 2025 Australian Open before losing to Emerson Jones. At the 2025 Wimbledon Championships she lost in the first round to Mimi Xu. In the girls' doubles she reached the final alongside compatriot Julieta Pareja where they lost to Kristina Penickova and Vendula Valdmannova. The following month, she paired with Kristina Penickova to win the Girls' Doubles title at the USTA U18s National Championships in San Diego to earn a wildcard spot in the main draw at the 2025 US Open.
In January 2026, Frodin had her best performance in girls' singles at a major, reaching the semifinals at the 2026 Australian Open, where she lost to Ekaterina Tupitsyna.
Senior career A wildcard pairing with Kristina Penickova in the women's doubles at the 2025 US Open, they were drawn against compatriots Reese Brantmeier and Alanis Hamilton in the first round.
Awarded a wildcard into the main draw of the singles at the 2026 US Open after winning the USTA Billie Jean King Girls' 18s National Championships, she was defeated in the first round by No. 2 seed Elena Rybakina.
Personal life Her father, Mathias, is Swedish. Her mother was born in France and grew up in Gabon. Frodin has dual citizenship with Sweden.
She portrayed some tennis scenes of a young Serena Williams in the 2021 sports biographical film King Richard, starring Will Smith.
ITF Circuit finals
Singles: 1 (1 runner–up) LegendW35 tournaments (0–1)Finals by surfaceHard (0–1)Clay (–)
ResultW–LDateTournamentTierSurfaceOpponentScoreLoss0–1Feb 2026Arcadia Women's Pro Open, USW35Hard Akasha Urhobo2–6, 6–2, 2–6
Doubles: 1 (1 runner–up) LegendW35 tournaments (0–1)Finals by surfaceHard (–)Clay (0–1)
ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss0–1Nov 2025ITF Orlando, USW35Clay Welles Newman Samantha Alicea Malkia Ngounoue1–6, 7–6(5), [9–11]
Junior Grand Slam finals
Doubles: 1 (runner-up) ResultYearTournamentSurfacePartnerOpponentScoreLoss2025WimbledonGrass Julieta Pareja Kristina Penickova Vendula Valdmannová4–6, 2–6
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