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Sofia Costoulas

TennisWTARight-handed

Sofia Costoulas

BelgiumAge and results

Sofia Costoulas is a tennis player on the WTA Tour who reached a career-high ranking of No. 134 on March 30, 2026.

12 WTA Tour matches

Updated

2026 record3-9Career highNo. 134Mar 30, 2026Agatha's record2-24 graded calls since Oct 1, 2026

About Sofia Costoulas

Born in Genk, Belgium, on April 2, 2005, Sofia Costoulas plays on the WTA Tour and hits a two-handed backhand. She played her first season as a professional in 2021, and on March 30, 2026, she reached a career-high ranking of No. 134.

Agatha Research DeskUpdated Nov 11, 2026

Match history12

Every WTA Tour, Grand Slam and Olympic main-draw match in our records, newest first. A walkover is listed but never counted in a record.

2026: 20-22

DateTournamentRoundOpponentResultScoreSurface
Nov 11DIRECTV Open Presentado por CompesarRound 2Laura SamsonL2-6, 2-6
Nov 9DIRECTV Open Presentado por CompesarRound 1Antonella Esquivel UsecheW6-0, 6-1
Nov 3Reto Win Tennis Cali OpenRound 1Marina Bassols RiberaL2-6, 0-6Clay
Oct 27Queretaro OpenRound 1Valeriya StrakhovaL4-6, 3-6Clay
Oct 5Suzhou OpenRound 1Darya AstakhovaL3-6 ret. (ret.)Hard
Sep 30Jingshan Tennis OpenRound 2Sofya LansereL3-6, 4-6Hard
Sep 28Jingshan Tennis OpenRound 1Kristina MladenovicW6-2, 7-5Hard
Sep 22Singapore Tennis OpenRound 1Tatiana ProzorovaL7-5, 6-7(2), 2-6Hard
Aug 26US OpenQualifying 2nd RoundElvina KalievaL6-3, 3-6, 4-6Hard
Aug 25US OpenQualifying 1st RoundJennifer RuggeriW7-5, 6-4Hard
Aug 4Warsaw T-Mobile Polish OpenRound 1Gabriela KnutsonL2-6, 4-6Hard
Jul 29Odlum Brown VanOpenRound 2Maddison InglisL3-6, 3-6Hard
Show 30 more
Jul 29Odlum Brown VanOpenRound 1Lizette CabreraW6-2, 6-2Hard
Jul 20Livesport Prague OpenRound 1Ayla AksuL6-2, 3-6, 4-6Hard
Jul 19Livesport Prague OpenQualifying FinalAyla AksuW7-5, 6-2Hard
Jul 18Livesport Prague OpenQualifying 1st RoundNao HibinoW6-7(4), 7-5, 6-4Hard
Jul 14Vanda Pharmaceuticals Athens OpenRound 1Tereza ValentovaL1-6, 2-6Hard
Jun 23WimbledonQualifying 1st RoundStorm HunterL5-7, 4-6Grass
Jun 3Open delle Puglie TrofeoRound 2Tatiana PieriL6-1, 3-2 ret. (ret.)Clay
Jun 1Open delle Puglie TrofeoRound 1Sapfo SakellaridiW6-4, 2-6, 6-3Clay
May 21Roland GarrosQualifying FinalGuo HanyuL3-6, 4-6Clay
May 20Roland GarrosQualifying 2nd RoundMai HontamaW6-4, 6-3Clay
May 18Roland GarrosQualifying 1st RoundTereza MrdezaW6-0, 6-2Clay
May 5Istanbul OpenRound 1Mia RisticL6-2, 5-5 ret. (ret.)Clay
May 1L'Open 35 de Saint MaloQuarterfinalMoyuka UchijimaL4-6, 1-6Clay
Apr 29L'Open 35 de Saint MaloRound 2Leolia JeanjeanW4-6, 7-6(1), 6-1Clay
Apr 28L'Open 35 de Saint MaloRound 1Ayla AksuW7-5, 7-6(4)Clay
Apr 22Oeiras Open CETORound 2Elena PridankinaL2-6, 3-6Clay
Apr 20Oeiras Open CETORound 1Anouk KoevermansW6-4, 6-4Clay
Mar 31Copa Colsanitas ColsubsidioRound 1Hanne VandewinkelL3-6, 6-2, 3-6Clay
Feb 20Open Arena Les Sables d'OlonneQuarterfinalFiona FerroL4-6, 3-6Hard
Feb 18Open Arena Les Sables d'OlonneRound 2Astrid Lew Yan FoonW6-2, 6-2Hard
Feb 16Open Arena Les Sables d'OlonneRound 1Chloe PaquetW6-1, 6-2Hard
Jan 29Philippine Women's OpenQuarterfinalTatiana ProzorovaL6-4, 2-6, 4-6Hard
Jan 27Philippine Women's OpenRound 2Ma YeXinW6-2, 6-4Hard
Jan 26Philippine Women's OpenRound 1Viktoria MorvayovaW6-7(8), 7-6(4), 6-4Hard
Jan 13Australian OpenQualifying 1st RoundLanlana TararudeeL4-6, 3-6Hard
Jan 8ASB ClassicQuarterfinalIva JovicL2-6, 6-7(6)Hard
Jan 7ASB ClassicRound 2Kaitlin QuevedoW6-2, 6-0Hard
Jan 4ASB ClassicRound 1Whitney OsuigweW6-4, 3-6, 6-1Hard
Jan 3ASB ClassicQualifying FinalVeronika ErjavecW6-3, 4-6, 6-3Hard
Jan 2ASB ClassicQualifying 1st RoundElyse TseW6-0, 6-1Hard

How she is doing nowThrough Nov 11

2026 record3-9clay 0-3, hard 2-5, unknown 1-1
Last 103-7LWLLLLWLLWNewest first. Lost her last match.

Agatha on Sofia Costoulas

Every graded call Agatha sealed on her matches since Oct 1, 2026, newest first. Each is 1 unit at its sealed price; the number opens its receipt.

Record2-2Units-1.21u4 graded calls
DateMatchCallPriceResultUnitsReceipt
Nov 11vs Laura SamsonPREDLaura Samson to win-286WON+0.35u#3184
Nov 3vs Marina Bassols RiberaLEANMarina Bassols Ribera to win-225WON+0.44u#2599
Oct 27vs Valeriya StrakhovaPREDSofia Costoulas to win-357LOST-1.00u#1981
Oct 4vs Darya AstakhovaPREDSofia Costoulas to win-139LOST-1.00u#306

Career

  1. 2026First WTA matchBeat Whitney Osuigwe, ASB Classic
  2. 2026Career high No. 134Mar 30, 2026
  3. Nov 11, 2026Latest matchLost to Laura Samson, DIRECTV Open Presentado por Compesar

First WTA match

Jan 4, 2026: beat Whitney Osuigwe 6-4, 3-6, 6-1ASB Classic, on hard

Latest match

Nov 11, 2026: lost to Laura Samson 2-6, 2-6DIRECTV Open Presentado por Compesar, Round 2

WTA 125 and ITF finals

WTA 125: 2 doubles finals, 2 won. ITF: 13 singles finals, 5 won. From 2021 to 2026.

Singles

  1. W
    Mar 2026Won the title at Kofu International Open, Japan (W75, hard), beating Ma Yexin 7-5, 6-3.
  2. L
    Aug 2025Runner-up at ITF Heraklion, Greece (W35, hard), losing to Lola Radivojevic 0-6, 1-4 ret.
  3. L
    May 2025Runner-up at ITF Otocec, Slovenia (W50, clay), losing to Amarissa Toth 3-6, 3-6.
  4. W
    Apr 2025Won the title at ITF Calvi, France (W75, hard), beating Tessah Andrianjafitrimo 7-5, 6-1.
  5. W
    Mar 2025Won the title at ITF Helsinki, Finland (W35, indoor hard), beating Lily Miyazaki 6-3, 7-5.
  6. L
    May 2024Runner-up at ITF Klagenfurt, Austria (W35, clay), losing to Marie Benoit 1-6, 3-6.
  7. W
    Dec 2023Won the title at ITF Limassol, Cyprus (W25, hard), beating Silvia Ambrosio 6-1, 6-3.
  8. L
    Nov 2023Runner-up at ITF Limassol, Cyprus (W25, hard), losing to Hanne Vandewinkel 2-6, 6-4, 4-6.
Show 5 more
  1. W
    May 2023Won the title at ITF Feld am See, Austria (W25, clay), beating Lara Salden 6-3, 6-1.
  2. L
    Jun 2022Runner-up at ITF Gurugram, India (W25, hard), losing to Karman Thandi 4-6, 6-2, 1-6.
  3. L
    Jan 2022Runner-up at ITF Monastir, Tunisia (W15, hard), losing to Akvile Parazinskaite 5-7, 2-6.
  4. L
    Dec 2021Runner-up at ITF Monastir, Tunisia (W15, hard), losing to Eudice Chong 6-3, 4-6, 6-7(5).
  5. L
    Feb 2021Runner-up at ITF Sharm El Sheikh, Egypt (W15, hard), losing to Magali Kempen 3-6, 2-6.

Doubles

  1. W
    Oct 2026Won the title at Queretaro Open, Mexico (clay) with Valeriya Strakhova, beating Marian Gomez Pezuela Cano and Nadia Podoroska 6-1, 6-1.
  2. W
    Apr 2026Won the title at Oeiras CETO Open, Portugal (clay) with Matilde Jorge, beating Magali Kempen and Lara Salden 6-4, 6-2.

Most often against

The players she has met most in our records, with the head-to-head.

Ayla Aksu3 meetings
2-1Costoulas leads

Last: Jul 20, 2026, Livesport Prague Open Round 1, lost

Anouk Koevermans2 meetings
1-1All square

Last: Apr 20, 2026, Oeiras Open CETO Round 1, won

Tatiana Prozorova2 meetings
0-2Costoulas trails

Last: Sep 22, 2026, Singapore Tennis Open Round 1, lost

Weronika Falkowska2 meetings
2-0Costoulas leads

Last: Oct 1, 2025, Samsun Open Round 1, won

Sources and updates

Results and schedules come from Agatha's own records of the WTA Tour.

Updated Nov 11, 2026, 12:40 PM ET. Results and form refresh after every match; biography facts are checked weekly.