Wikipedia

Sofia Costoulas

Sofia Costoulas (Greek: Κωστούλα, romanized: Kostoula; born 2 April 2005) is a Belgian professional tennis player. She has career-high rankings of No. 134 in singles, achieved on 30 March 2026, and No. 229 in doubles, achieved on 25 September 2023.

Sofia Costoulas
Country (sports) Belgium
Born (2005-04-02) 2 April 2005 (age 21)
Genk, Belgium
PlaysRight-handed (two-handed backhand)
Prize money$338,676
Singles
Career record197–129
Career titles5 ITF
Highest rankingNo. 134 (30 March 2026)
Current rankingNo. 150 (8 June 2026)
Grand Slam singles results
Australian OpenQ1 (2026)
French OpenQ3 (2026)
WimbledonQ1 (2025, 2026)
US OpenQ1 (2025)
Doubles
Career record79–50
Career titles1 WTA 125, 4 ITF
Highest rankingNo. 229 (25 September 2023)
Current rankingNo. 322 (8 June 2026)
Last updated on: 8 June 2026.

Early life

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Costoulas was born in Genk to a Greek-Congolese father and a Belgian mother.[1] Her father was a professional footballer who played for Sint-Truidense V.V., K. Patro Eisden Maasmechelen, and C.S. Visé.[2] She began playing tennis at the age of four. She trained at her local club in Genk, the Kim Clijsters Academy, and the Justine Henin Academy.[1][2]

Career overview

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Junior years

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In July 2021, she and Laura Hietaranta reached the girls' doubles final of Wimbledon, but lost to Kristina Dmitruk and Diana Shnaider.[3] In September 2021, she reached the girls' singles third round of the US Open.[4]

In January 2022, she won the J1 Traralgon Tennis International, defeating Kayla Cross in the final.[4] Later that month, she reached the girls' singles final of the Australian Open, but lost to Petra Marčinko.[5][6] In April 2022, she won back-to-back J1 titles in Vrsar and Plovdiv.[1] The following month, she also won the JA International HTV Junior Open in Offenbach am Main.[7]

Professional

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In December 2021, she reached back-to-back W15 finals in Monastir.[8] In February 2022, she reached the semifinals of the W25 Copa Banco in Guayaquil.[1] In October 2022, she won her first professional doubles title at the W25 tournament in Hua Hin, partnering Punnin Kovapitukted.[9][10]

In April 2025, she won her biggest title to-date at the W75 Ladies Open Calvi Eaux de Zilia, defeating Tessah Andrianjafitrimo in the final.[11] The following month, she reached the second round of the qualifying competition of the French Open, but ultimately failed to advance into the main draw.[12]

Costoulas made her WTA Tour main-draw debut as a qualifier at the 2026 ASB Classic in Auckland and defeated fellow qualifiers Whitney Osuigwe[13] and Kaitlin Quevedo to reach the quarterfinals,[14] at which point her run was ended by third seed Iva Jovic.[15]

Playing alongside Matilde Jorge, she won her first WTA 125 doubles title at the 2026 Oeiras CETO Open, defeating Magali Kempen and Lara Salden in the final.[16]

Grand Slam singles performance timeline

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Key
W  F  SF QF #R RRQ# P# DNQ A Z# PO G S B NMS NTI P NH
(W) winner; (F) finalist; (SF) semifinalist; (QF) quarterfinalist; (#R) rounds 4, 3, 2, 1; (RR) round-robin stage; (Q#) qualification round; (P#) preliminary round; (DNQ) did not qualify; (A) absent; (Z#) Davis/Fed Cup Zonal Group (with number indication) or (PO) play-off; (G) gold, (S) silver or (B) bronze Olympic/Paralympic medal; (NMS) not a Masters tournament; (NTI) not a Tier I tournament; (P) postponed; (NH) not held; (SR) strike rate (events won / competed); (W–L) win–loss record.
To avoid confusion and double counting, these charts are updated at the conclusion of a tournament or when the player's participation has ended.
Tournament 2025 W–L
Australian Open A 0–0
French Open Q2 0–0
Wimbledon Q1 0–0
US Open Q1 0–0
Win–loss 0–0 0–0

WTA 125 finals

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Doubles: 1 (title)

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Result W–L    Date    Tournament Surface Partner Opponents Score
Win 1-0 Apr 2026 Oeiras CETO Open, Portugal Clay Portugal Matilde Jorge Belgium Magali Kempen
Belgium Lara Salden		 6–4, 6–2

ITF Circuit finals

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Singles: 13 (5 titles, 8 runner-ups)

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Legend
W75 tournaments
W50 tournaments
W25/35 tournaments
W15 tournaments
Finals by surface
Hard (4–6)
Clay (1–2)
Result W–L    Date    Tournament Tier Surface Opponent Score
Loss 0–1 Feb 2021 ITF Sharm El Sheikh, Egypt W15 Hard Belgium Magali Kempen 3–6, 2–6
Loss 0–2 Dec 2021 ITF Monastir, Tunisia W15 Hard Hong Kong Eudice Chong 6–3, 4–6, 6–7(5)
Loss 0–3 Jan 2022 ITF Monastir, Tunisia W15 Hard Lithuania Akvilė Paražinskaitė 5–7, 2–6
Loss 0–4 Jun 2022 ITF Gurugram, India W25 Hard India Karman Thandi 4–6, 6–2, 1–6
Win 1–4 May 2023 ITF Feld am See, Austria W25 Clay Belgium Lara Salden 6–3, 6–1
Loss 1–5 Nov 2023 ITF Limassol, Cyprus W25 Hard Belgium Hanne Vandewinkel 2–6, 6–4, 4–6
Win 2–5 Dec 2023 ITF Limassol, Cyprus W25 Hard Italy Silvia Ambrosio 6–1, 6–3
Loss 2–6 May 2024 ITF Klagenfurt, Austria W35 Clay Belgium Marie Benoît 1–6, 3–6
Win 3–6 Mar 2025 ITF Helsinki, Finland W35 Hard (i) United Kingdom Lily Miyazaki 6–3, 7–5
Win 4–6 Apr 2025 ITF Calvi, France W75 Hard France Tessah Andrianjafitrimo 7–5, 6–1
Loss 4–7 May 2025 ITF Otočec, Slovenia W50 Clay Hungary Amarissa Tóth 3–6, 3–6
Loss 4–8 Aug 2025 ITF Heraklion, Greece W35 Hard Serbia Lola Radivojević 0–6, 1–4 ret.
Win 5–8 Mar 2026 Kōfu International Open, Japan W75 Hard China Ma Yexin 7–5, 6–3

Doubles: 12 (4 titles, 8 runner-ups)

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Legend
W60/75 tournaments
W50 tournaments
W25/35 tournaments
W15 tournaments
Finals by surface
Hard (2–6)
Clay (2–1)
Carpet (0–1)
Result W–L    Date    Tournament Tier Surface Partner Opponents Score
Loss 1–0 Feb 2022 ITF Monastir, Tunisia W15 Hard United States Clervie Ngounoue Belarus Kristina Dmitruk
Russia Maria Sholokhova		 6–3, 2–6, [5–10]
Win 1–1 Oct 2022 ITF Hua Hin, Thailand W25 Hard Thailand Punnin Kovapitukted Japan Risa Ushijima
South Korea Wi Hwi-won		 6–1, 6–2
Loss 1–2 Mar 2023 ITF Pretoria, South Africa W60 Hard Italy Dalila Spiteri Japan Mai Hontama
France Alice Tubello		 3–6, 3–6
Loss 1–3 May 2023 ITF Feld am See, Austria W25 Clay Canada Kayla Cross Czech Republic Denisa Hindová
United States Chiara Scholl		 2–6, 0–6
Win 2–3 Jun 2023 ITF Troisdorf, Germany W25 Clay Belgium Lara Salden United States Chiara Scholl
Belgium Tilwith Di Girolami		 7–6(4), 6–4
Win 3–3 Jun 2023 ITF Tainan, Taiwan W25 Clay Chinese Taipei Li Yu-yun Chinese Taipei Lee Ya-hsin
Chinese Taipei Lee Ya-hsuan		 6–4, 6–4
Loss 3–4 Jul 2023 ITF Corroios, Portugal W25 Hard Switzerland Lulu Sun Australia Talia Gibson
Australia Petra Hule		 3–6, 6–3, [6–10]
Loss 3–5 Sep 2023 ITF Leiria, Portugal W25 Hard Switzerland Jenny Dürst Portugal Francisca Jorge
Portugal Matilde Jorge		 5–7, 6–7(5)
Loss 3–6 Feb 2024 ITF Pretoria, South Africa W50 Hard Belgium Hanne Vandewinkel Israel Lina Glushko
Czech Republic Gabriela Knutson		 6–7(5), 6–7(4)
Loss 3–7 Mar 2025 ITF Solarino, Italy W35 Carpet Germany Katharina Hobgarski Slovakia Viktória Hrunčáková
Slovakia Katarína Kužmová		 7–6(4), 4–6, [5–10]
Loss 3–8 Mar 2025 Open Nantes Atlantique, France W50 Hard (i) Australia Talia Gibson Poland Martyna Kubka
Sweden Lisa Zaar		 3–6, 2–6
Win 4–8 Mar 2026 All Japan Indoor Championships W75 Hard (i) Russia Sofya Lansere Japan Hayu Kinoshita
Japan Sara Saito		 6–2, 6–4

Junior Grand Slam tournament finals

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Girls' singles: 1 (runner-up)

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Result Year Tournament Surface Opponent Score
Loss 2022 Australian Open Hard Croatia Petra Marčinko 5–7, 1–6

Girls' doubles: 1 (runner-up)

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Result Year Tournament Surface Partner Opponents Score
Loss 2021 Wimbledon Grass Finland Laura Hietaranta Belarus Kristina Dmitruk
Russia Diana Shnaider		 1–6, 2–6

Notes

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References

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  1. 1 2 3 4 McLean, Ross (26 April 2022). "Costoulas: I saw her on TV and instantly asked my parents for a racket". International Tennis Federation. Retrieved 17 June 2025.
  2. 1 2 Hanquet, Christine (27 January 2020). "La Belge Sofia Costoulas, 14 ans, apprend son futur métier de joueuse, à l'Australian Open". RTBF (in French). Retrieved 17 June 2025.
  3. ↑ McLean, Ross (11 July 2021). "Spanish eyes smile as Mintegi Del Olmo makes history at Wimbledon". International Tennis Federation. Retrieved 17 June 2025.
  4. 1 2 McLean, Ross (20 January 2022). "'I've allowed myself to dream': Traralgon champs eye Aussie Open glory". International Tennis Federation. Retrieved 17 June 2025.
  5. ↑ Van Genechten, Vincent (28 January 2022). "Nieuw Belgisch toptalent in aantocht? Sofia Costoulas plaatst zich makkelijk voor finale junioren op Australian Open". Het Nieuwsblad (in Flemish). Retrieved 17 June 2025.
  6. ↑ McLean, Ross (29 January 2022). "'A memory that'll last forever': Marcinko wins Aus Open girls' title". International Tennis Federation. Retrieved 17 June 2025.
  7. ↑ McLean, Ross (3 May 2022). "Costoulas and Nicod seal maiden Grade A triumphs at Offenbach". International Tennis Federation. Retrieved 17 June 2025.
  8. ↑ McLean, Ross (28 January 2022). "'I was shaking': Marcinko and Costoulas set for Australian Open final". International Tennis Federation. Retrieved 17 June 2025.
  9. ↑ De Pauw, Jeroen (15 October 2022). "17-jarig Belgisch tennistalent Sofia Costoulas wint in Thailand haar eerste proftoernooi". Gazet van Antwerpen (in Flemish). Retrieved 17 June 2025.
  10. ↑ Devilez, Alice (15 October 2022). "Sofia Costoulas remporte le double à Hua Hin, son premier titre chez les seniors". RTBF (in French). Retrieved 17 June 2025.
  11. ↑ "Tennis: Sofia Costoulas remporte l'Open Ladies de Calvi". Corse-Matin (in French). 20 April 2025. Retrieved 17 June 2025.
  12. ↑ Verstrepen, Christophe (17 June 2025). "Avant sa première à Roland-Garros, Sofia Costoulas se remémore un mauvais souvenir : "Cette star de l'époque m'avait refusé un autographe"". La DH Les Sports+ (in French). Retrieved 17 June 2025.
  13. ↑ "On WTA debut, Belgium's Costoulas outlasts Osuigwe in Auckland three-setter". Women's Tennis Association. Retrieved 14 March 2026.
  14. ↑ "In first WTA main draw, Costoulas beats Quevedo to make Auckland quarters". Women's Tennis Association. Retrieved 14 March 2026.
  15. ↑ "Jovic defeats Costoulas at Auckland 2026". Tennis Temple. Retrieved 14 March 2026.
  16. ↑ "Matilde Jorge Claims Third Straight Oeiras CETO Open Doubles Title". tennistourtalk.com. Retrieved 25 April 2026.
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