Raphaëlle Lacasse (born 16 August 2000) is a Canadian tennis player.
Lacasse has a career-high singles ranking by the WTA of 646, achieved on 24 November 2025, and a best doubles ranking of world No. 213, achieved on 16 March 2026.
Lacasse played at the Kansas Jayhawks between 2021 and 2022 in the NCAA tennis championships. In June 2022, she transferred to Nebraska.
Career Lacasse won her first W75 title at the 2025 Challenger de Saguenay in the doubles draw, partnering with fellow Canadian Ariana Arseneault. WTA 125 finals Doubles: 1 (runner-up) ResultW–LDateTournamentSurfacePartnerOpponentsScoreLoss0–2Porto Open, PortugalHard Ariana Arseneault Francisca Jorge Matilde Jorge3–6, 6–3, [3–10]
ITF Circuit finals Singles: 1 (title) LegendW15 tournaments (1–0)Finals by surfaceHard (1–0) ResultW–LDateTournamentTierSurfaceOpponentScoreWin 1–0 Nov 2019ITF Cancún, MexicoW15 Hard Viktória Morvayová 6–4, 7–5
Doubles: 14 (7 titles, 7 runner-ups) LegendW75 tournaments (1–0)W50 tournaments (2–2) W35 tournaments (2–0)W15 tournaments (2–5)Finals by surfaceHard (7–6)Clay (0–1) ResultW–LDateLocationTierSurfacePartnerOpponentsScoreLoss 0–1 Oct 2018ITF Mexico City, MexicoW15 Hard María Fernanda Carvajal Jéssica Hinojosa Gómez Anastasiya Antal 1–6, 4–6Loss 0–2 Sep 2019ITF Buenos Aires, ArgentinaW15 Clay Eugenia Ganga María Paulina Pérez Jessica Plazas 6–7(8), 4–6Loss 0–3 Mar 2021ITF Sharm El Sheikh, EgyptW15 Hard Ku Yeon-woo Alicia Barnett Yuriko Miyazaki 4–6, 1–6Loss 0–4 Mar 2021ITF Sharm El SheikhW15 Hard Anna Sisková Elena-Teodora Cadar Olivia Gadecki 3–6, 4–6Win 1–4 Jun 2024ITF Santo Domingo, Dominican RepublicW15 Hard Ana Carmen Zamburek Sharmada Balu Riya Bhatia 6–3, 6–4Win 2–4 Mar 2025ITF Montreal, CanadaW15 Hard (i) Christina McHale Sara Daavettila Sabastiani León 7–5, 6–1Loss 2–5 Aug 2025ITF Saskatoon, CanadaW50 Hard Alexandra Vagramov Saki Imamura Hiroko Kuwata 6–7(3), 6–3, [1–10]Loss 2–6 Sep 2025ITF Monastir, TunisiaW15 Hard Nelise Verster Alicia Dudeney Megan Heuser 4–6, 7–6(6), [6–10]Win 3–6 Oct 2025ITF Quebec City, CanadaW35 Hard (i) Alexandra Vagramov Haruna Arakawa Natsuho Arakawa 6–3, 6–2Win 4–6 Oct 2025Challenger de Saguenay, CanadaW75 Hard (i) Ariana Arseneault Jasmijn Gimbrère Anna Rogers 5–7, 6–3, [10–5]Win 5–6 Nov 2025ITF Chihuahua, MexicoW50 Hard Ariana Arseneault Fernanda Navarro Alexandra Vagramov 2–6, 7–6(4), [10–6]Loss 5–7 Nov 2025ITF Chihuahua, MexicoW50 Hard Ariana Arseneault Dalayna Hewitt Anna Rogers 3–6, 0–6Win 6–7 Feb 2026ITF The Hague, NetherlandsW35 Hard (i) Ariana Arseneault Valentina Ivanov Rebecca Munk Mortensen 6–4, 3–6, [10–5]Win 7–7 Sep 2026ITF Évora, PortugalW50 Hard Ariana Arseneault Katarína Kužmová Elena Micic 6–3, 6–4
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