Katerina Stewart (born July 17, 1997) is an American tennis and pickleball player.

Stewart has won 13 singles and five doubles titles on the ITF Women's Circuit. She reached her best singles ranking of world No. 158 in July 2015, and peaked at No. 400 in the doubles rankings on 30 July 2018.

Stewart made her WTA Tour debut at the 2014 US Open, with a wildcard entry into the doubles draw alongside Louisa Chirico.

She enrolled at the West Point Preparatory School, starting the program in July 2016.

Personal life She is of Argentine-Italian descent through her mother, Marina. Her Romanian-born father, Caesar, is the director of the Next Level Tennis Academy in Coral Gables, Florida.

ITF Circuit finals Singles: 18 (13 titles, 5 runner-ups) Legend$100,000 tournaments$80,000 tournaments$50,000 tournaments$25,000 tournaments$10/15,000 tournamentsFinals by surfaceHard (2–0)Clay (11–5) ResultW–LDateTournamentTierSurfaceOpponentScoreLoss 0–1 Mar 2014ITF Gainesville, United States10,000 Clay Kateřina Kramperová 3–6, 2–6Win 1–1 Mar 2014ITF Orlando, US10,000 Clay Elizaveta Ianchuk 6–1, 6–1Win 2–1 Jun 2014ITF Bethany Beach, US10,000 Clay Josie Kuhlman 6–0, 6–3Win 3–1 Jun 2014ITF Charlotte, US10,000 Clay Josie Kuhlman 6–1, 7–62Win 4–1 Mar 2015ITF Gainesville, US10,000 Clay Sofia Kenin 6–4, 4–6, 6–4Win 5–1 Mar 2015Innisbrook Open, US25,000 Clay Maryna Zanevska 1–6, 6–3, 2–0 ret.Loss 5–2 Apr 2015Dothan Pro Classic, US50,000 Clay Louisa Chirico 6–71, 6–3, 6–71Loss 5–3 May 2015Charlottesville Open, US50,000 Clay Allie Kiick 7–5, 6–73, 7–5Win 6–3 May 2015ITF Indian Harbour Beach, US50,000 Clay Louisa Chirico 6–4, 3–6, 6–3Win 7–3 Mar 2016ITF Weston, US10,000 Clay Chanel Simmonds 3–6, 6–2, 6–1Win 8–3 Mar 2016ITF Orlando, US10,000 Clay Grace Min 6–4, 6–3Win 9–3 Aug 2017ITF Fort Worth, US25,000 Hard Emiliana Arango 6–4, 6–1Win 10–3 Mar 2018ITF Tampa, US15,000 Clay Jessica Pegula 6–2, 6–3Win 11–3 May 2019ITF Naples, US.15,000 Clay Belinda Woolcock 6–4, 6–3Loss 11–4 Aug 2019ITF Guayaquil, Ecuador25,000 Clay Camila Osorio 5–7, 6–73Loss 11–5 Aug 2019ITF Guayaquil, Ecuador25,000 Clay Camila Osorio 5–7, 3–6Win 12–5 Tennis Classic of Macon, US80,000 Hard Shelby Rogers 6–72, 6–3, 6–2Win 13–5 Oct 2021ITF Hilton Head, US15,000 Clay Raveena Kingsley 6–4, 6–2

Doubles: 10 (5 titles, 5 runner-ups) Legend$50,000 tournaments$25,000 tournaments$10/15,000 tournamentsFinals by surfaceClay (5–5) ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreWin 1–0 Dec 2012ITF Antalya, Turkey10,000 Clay Justine De Sutter Irina Bara Ioana Loredana Roșca 7–5, 6–4Loss 1–1 Dec 2012ITF Antalya, Turkey10,000 Clay Justine De Sutter Anastasia Grymalska Julia Stamatova 2–6, 6–3, [8–10]Loss 1–2 Jun 2014ITF Bethany Beach, US10,000 Clay Rima Asatrian Lena Litvak Alexandra Mueller 4–6, 1–6Win 2–2 Feb 2015ITF Sunrise, US25,000 Clay Anna Kalinskaya Paula Cristina Gonçalves Beatriz Haddad Maia 7–6(6), 5–7, [10–6]Loss 2–3 Mar 2015ITF Orlando, US10,000 Clay Kateřina Kramperová Ingrid Neel Fanny Stollár 3–6, 6–7(4)Win 3–3 Mar 2016ITF Weston, US10,000 Clay Tess Sugnaux Julieta Lara Estable Jasmine Paolini 7–6(2), 6–3Loss 3–4 Mar 2016ITF Osprey, US50,000 Clay Louisa Chirico Asia Muhammad Taylor Townsend 1–6, 7–6(5), [4–10]Loss 3–5 Mar 2018ITF Tampa, US15,000 Clay Rasheeda McAdoo Caty McNally Natasha Subhash 6–3, 3–6, [6–10]Win 4–5 Aug 2019ITF Guayaquil, Ecuador25,000 Clay Gabriela Lee Yuliana Lizarazo Camila Osorio 6–7(1), 7–6(6), [10–7]Win 5–5 Oct 2021ITF Hilton Head, US15,000 Clay Anastasia Sysoeva Emily Meyer Maria Aran Teixido w/o

Junior Grand Slam finals Doubles (0–1) ResultYearTournamentSurfacePartnerOpponentsScoreLoss 2015 French Open Clay Caroline Dolehide Miriam Kolodziejová Markéta Vondroušová 6–0, 6–3

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