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Sofia Sewing (born July 22, 1999) is an American professional tennis player. She has reached a career-high ITF junior ranking of world No. 9, as well as WTA rankings of 455 in singles and 125 in doubles.
Over her career, Sewing has won four singles and 14 doubles titles at tournaments of the ITF Circuit. In December 2023, she reached her first final on the WTA Challenger Tour, partnering with María Paulina Pérez in Buenos Aires, Argentina, but they lost the match in a super-tiebreaker to María Lourdes Carlé and Despina Papamichail.
| Loss | 0–1 | Buenos Aires Open, Argentina | Clay | María Paulina Pérez | María Lourdes Carlé Despina Papamichail | 3–6, 6–4, 9–11 |
| Loss | 0–1 | Dec 2017 | ITF Guayaquil, Ecuador | 15,000 | Clay | Nika Kukharchuk | 0–6, 6–2, 2–6 |
| Win | 1–1 | May 2019 | ITF Cancún, Mexico | 15,000 | Hard | Emilie Lindh | 6–1, 1–6, 6–1 |
| Win | 2–1 | Jan 2020 | ITF Cancún, Mexico | 15,000 | Hard | Anastasia Sysoeva | 7–5, 6–0 |
| Win | 3–1 | Sep 2022 | ITF Guayaquil, Ecuador | 15,000 | Clay | María Herazo González | 4–6, 6–3, 6-2 |
| Loss | 3–2 | Oct 2022 | ITF Guayaquil, Ecuador | 15,000 | Clay | María Herazo González | 4–6, 3-6 |
| Loss | 3–3 | Oct 2022 | ITF Bucaramanga, Colombia | 15,000 | Clay | Kaitlin Quevedo | 3–6, 7–6(6), 5–7 |
| Loss | 3–4 | Nov 2022 | ITF Lima, Peru | 15,000 | Clay | Noelia Zeballos | 6–3, 3–6, 0–6 |
| Win | 4–4 | Nov 2022 | ITF Lima, Peru | 15,000 | Clay | María Herazo González | 7–6(3), 6–1 |
| $80,000 tournaments (0–1) |
| $60,000 tournaments (1–0) |
| $40,000 tournaments (2–1) |
| $25,000 tournaments (7–5) |
| $10/15,000 tournaments (4–4) |
| Loss | 0–1 | Jun 2016 | ITF Bethany Beach, United States | 10,000 | Clay | Veronika Miroshnichenko | Sophie Chang Alexandra Mueller | 1–6, 4–6 |
| Win | 1–1 | Nov 2017 | ITF Manta, Ecuador | 15,000 | Hard | María Portillo Ramírez | Emily Appleton María Herazo González | 6–1, 6–3 |
| Win | 2–1 | Dec 2017 | ITF Guayaquil, Ecuador | 15,000 | Clay | María Portillo Ramírez | Stephanie Nemtsova Dominique Schaefer | 7–5, 6–2 |
| Loss | 2–2 | Nov 2018 | ITF Norman, US | 25,000 | Hard | María Portillo Ramírez | Vladica Babić Ena Shibahara | 2–6, 3–6 |
| Loss | 2–3 | Jun 2019 | ITF Wesley Chapel, US | 15,000 | Clay | Kylie Collins | Allura Zamarripa Maribella Zamarripa | 6–3, 4–6, 11–13 |
| Win | 3–3 | Sep 2019 | ITF Lubbock, US | 15,000 | Hard | María Portillo Ramírez | Ashlyn Krueger Shiori Fukuda | 6–2, 6–4 |
| Loss | 3–4 | Jan 2020 | ITF Cancún, Mexico | W15 | Hard | Victoria Rodríguez | Lian Tran Justina Mikulskytė | 2–6, 6–4, 7–10 |
| Loss | 3–5 | Sep 2020 | ITF Prague, Czech Republic | W25 | Clay | Katie Volynets | Anastasia Dețiuc Johana Marková | 2–6, 1–6 |
| Loss | 3–6 | Jan 2022 | ITF Blumenau-Gaspar, Brazil | W25 | Clay | Eva Vedder | Andrea Gámiz Bárbara Gatica | 4–6, 1–6 |
| Win | 4–6 | Jan 2022 | ITF Florianópolis, Brazil | W25 | Hard | Andrea Gámiz | Bárbara Gatica Rebeca Pereira | 6-4, 6-1 |
| Win | 5–6 | Jan 2022 | ITF Florianópolis, Brazil | W25 | Hard | Andrea Gámiz | Jessie Aney Ingrid Martins | 7–6(2), 6–4 |
| Win | 6–6 | Mar 2022 | ITF Guayaquil, Ecuador | W25 | Hard | Andrea Gámiz | Nicole Fossa Huergo Noelia Zeballos | 6–4, 7–5 |
| Win | 7–6 | Sep 2022 | ITF Guayaquil, Ecuador | W15 | Clay | María Paulina Pérez | Romina Ccuno María Herazo González | 6–4, 1–6, 10–2 |
| Loss | 7–7 | Oct 2022 | ITF Guayaquil, Ecuador | W15 | Clay | María Paulina Pérez | Romina Ccuno María Herazo González | 2–6, 7–5, 9-11 |
| Loss | 7–8 | Oct 2022 | ITF Ibagué, Colombia | W25 | Clay | María Herazo González | María Paulina Pérez Yuliana Lizarazo | 4–6, 5–7 |
| Win | 8–8 | Feb 2023 | ITF Mexico City, Mexico | W40 | Hard | Berfu Cengiz | Suzan Lamens Darja Semeņistaja | 6–1, 1–6, 12–10 |
| Win | 9–8 | Feb 2023 | ITF Santo Domingo, Dominican Republic | W25 | Hard | Darja Semeņistaja | Nefisa Berberović Eudice Chong | 6–3, 6–2 |
| Loss | 9–9 | Apr 2023 | ITF Boca Raton, US | W25 | Clay | Fanny Stollár | Makenna Jones Jamie Loeb | 7–5, 3–6, 8–10 |
| Win | 10–9 | April 2023 | ITF Guayaquil, Ecuador | W25 | Clay | Jessie Aney | Noelia Bouzo Zanotti Ani Vangelova | 6–0, 6–2 |
| Win | 11–9 | April 2023 | ITF Guayaquil, Ecuador | W25 | Clay | Jessie Aney | Ana Candiotto Rebeca Pereira | 6–1, 6–2 |
| Loss | 11-10 | Jun 2023 | ITF Otočec, Slovenia | W40 | Clay | Kayla Cross | Ekaterine Gorgodze Elvina Kalieva | 2-6, 3-6 |
| Win | 12–10 | Jun 2023 | ITF Pörtschach, Austria | W25 | Clay | Weronika Falkowska | Elena-Teodora Cadar Diāna Marcinkēviča | 6–1, 6–2 |
| Win | 13-10 | Jul 2023 | ITF Palma del Río, Spain | W40 | Hard | Andrea Gámiz | Robin Anderson Elysia Bolton | 6-3, 6–2 |
| Win | 14-10 | Oct 2023 | Georgia's Rome Open, US | W60 | Hard (i) | Anastasia Tikhonova | Robin Anderson Fernanda Contreras Gómez | 4–6, 6–3, 10–7 |
| Loss | 14-11 | Oct 2023 | Tennis Classic of Macon, US | W80 | Hard | Anastasia Tikhonova | Jana Kolodynska Tatiana Prozorova | 3–6, 2–6 |
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