Astrid Lew Yan Foon (born 15 August 2005) is a French tennis player.

Lew Yan Foon has a career-high singles ranking by the WTA of 351, achieved on 24 November 2025, and a best doubles ranking of world No. 532, achieved on 24 June 2024.

Career She made her WTA Tour main-draw debut as a qualifier at the 2025 Chennai Open, where she lost her first-round match against the defending champion, Linda Fruhvirtová.

ITF Circuit finals Singles: 3 (1 title, 2 runner-ups) LegendW35 tournaments (0–1)W15 tournaments (1–1)Finals by surfaceHard (1–1)Clay (0–1) ResultW–LDateTournamentTierSurfaceOpponentScoreWin 1–0 Jan 2025ITF Monastir, TunisiaW15 Hard Lara Schmidt 3–0 ret.Loss 1–1 Feb 2025ITF Manacor, SpainW15 Hard Elizara Yaneva 1–5 ret.Loss 1–2 Jul 2025ITF Horb, GermanyW35 Clay Park So-hyun 2–6, 6–1, 6–7(4)

Doubles: 5 (2 titles, 3 runner-ups) LegendW35 tournaments (0–1)W15 tournaments (2–2)Finals by surfaceHard (0–1)Clay (2–2) ResultW–LDateTournamentTierSurfacePartner OpponentsScoreWin 1–0 Jul 2023ITF Casablanca, MoroccoW15 Clay Marie Mettraux Alessandra Teodosescu Federica Urgesi 7–6(4), 7–6(5)Loss 1–1 Sep 2023ITF Dijon, FranceW15 Clay Marie Mettraux Polina Bakhmutkina Chelsea Vanhoutte 7–6(2), 4–6, [8–10]Loss 1–2 Oct 2023ITF Monastir, TunisiaW15 Hard Flavie Brugnone Abigail Amos Marente Sijbesma 4–6, 1–6Loss 1–3 Feb 2024ITF Hammamet, TunisiaW35 Clay Emma Léné Oana Gavrilă Sapfo Sakellaridi 1–6, 3–6Win 2–3 Apr 2024ITF Gonesse, FranceW15 Clay (i) Émeline Dartron Tilwith Di Girolami Laïa Petretic 3–6, 6–0, [13–11]

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