Sofia Costoulas (; born 2 April 2005) is a Belgian professional

tennis Tennis is a List of racket sports, racket sport that is played either individually against a single opponent (singles (tennis), singles) or between two teams of two players each (doubles (tennis), doubles). Each player uses a tennis racket st ...

player. She has career-high

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of No. 184 in singles, achieved on 16 June 2025, and No. 102 in doubles, achieved on 26 May 2025.

Early life

Costoulas was born in

Genk Genk () is a Municipalities of Belgium, municipality and City status in Belgium, city located in the Belgian Provinces of Belgium, province of Limburg (Belgium), Limburg near Hasselt. The municipality comprises only the town of Genk itself. It ...

to a Greek-Congolese father and a Belgian mother. Her father was a professional footballer who played for

Sint-Truidense V.V. Koninklijke Sint-Truidense Voetbalvereniging (), commonly known as Sint-Truiden or STVV () or by their nickname De Kanaries (), is a Belgian professional association football, football club located in the city of Sint-Truiden in Limburg (Belgium) ...

, K. Patro Eisden Maasmechelen, and C.S. Visé. 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.

Junior career

In July 2021, she and Laura Hietaranta reached the girls' doubles final of

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, but lost to Kristina Dmitruk and

Diana Shnaider Diana Maximovna Shnaider (, ; born 2 April 2004) is a Russian professional tennis player. She has a career-high rankings of world No. 11 in singles and No. 9 in doubles, achieved in May 2025. Shnaider won women's doubles silver at the 2024 Par ...

. In September 2021, she reached the girls' singles third round of the

US Open U.S. Open or US Open are open championship sporting tournaments that are hosted in the United States and in which anyone, especially amateur and professional, or American and non-American, may compete. The term may also be applied to non-sporting ev ...

. In January 2022, she won the J1

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, defeating

Kayla Cross Kayla Cross (born 21 March 2005) is a Canadian tennis player. She has a career-high WTA singles ranking of No. 217, achieved on 19 May 2025. Her career-high WTA doubles ranking is 159, achieved on 19 May 2025. Career Partnering Victoria Mboko, ...

in the final. Later that month, she reached the girls' singles final of the

Australian Open The Australian Open (stylized ΛO) is a tennis tournament organised by Tennis Australia annually at Melbourne Park in Melbourne, Victoria (state), Victoria, Australia. It is chronologically the first of the four Grand Slam (tennis), Grand Sl ...

, but lost to

Petra Marčinko Petra Marčinko (born 4 December 2005) is a Croatian tennis player. Marčinko has a career-high WTA rankings, WTA singles ranking of 132, achieved on 23 October 2023. She also has a career-high doubles ranking of 440, achieved on 21 April 2025. ...

. In April 2022, she won back-to-back J1 titles in

Vrsar Vrsar (Italian and Venetian: Orsera) is a seaside village and a municipality in Istria, west Croatia, located 9 kilometers south of Poreč. The historical center is located on top of a hill, including the St. Martin parish church and the 40-mete ...

and

Plovdiv Plovdiv (, ) is the List of cities and towns in Bulgaria, second-largest city in Bulgaria, 144 km (93 miles) southeast of the capital Sofia. It had a population of 490,983 and 675,000 in the greater metropolitan area. Plovdiv is a cultural hub ...

. The following month, she also won the JA International HTV Junior Open in

Offenbach am Main Offenbach am Main () is a List of cities and towns in Germany, city in Hesse, Germany, on the left bank of the river Main (river), Main. It borders Frankfurt and is part of the Frankfurt urban area and the larger Frankfurt Rhein-Main Regional Aut ...

Professional career

In December 2021, she reached back-to-back W15 finals in Monastir. In February 2022, she reached the semifinals of the W25 Copa Banco in

Guayaquil Guayaquil (), officially Santiago de Guayaquil, is the largest city in Ecuador and also the nation's economic capital and main port. The city is the capital (political), capital of Guayas Province and the seat of Guayaquil Canton. The city is ...

. In October 2022, she won her first professional doubles title at the W25 tournament in

Hua Hin Hua Hin (, ) is one of eight districts (''amphoe'') of Prachuap Khiri Khan province in the northern part of the Malay Peninsula in Thailand. Its seat of government, also named Hua Hin, is a beach resort town. The district's population was estim ...

, partnering Punnin Kovapitukted. In April 2025, she won her biggest title to-date at the W75 Ladies Open Calvi Eaux de Zilia, defeating

Tessah Andrianjafitrimo Tessah Andrianjafitrimo (born 11 October 1998) is a French professional tennis player of Malagasy descent. She was born in Montpellier, France. On 20 June 2022, she achieved her best WTA singles ranking of 139. Andrianjafitrimo has won six sin ...

in the final. The following month, she reached the second round of the qualifying competition of the

French Open The French Open (), also known as Roland-Garros (), is a tennis tournament organized by the French Tennis Federation annually at Stade Roland Garros in Paris, France. It is chronologically the second of the four Grand Slam (tennis), Grand Slam ...

, but ultimately failed to advance into the main draw.

Grand Slam singles performance timeline

ITF Circuit finals

Singles: 11 (4 titles, 7 runner-ups)

Doubles: 11 (3 titles, 8 runner-ups)

Junior Grand Slam tournament finals

Girls' singles: 1 (runner-up)

Girls' doubles: 1 (runner-up)

Notes

References

External links

* * * * * {{DEFAULTSORT:Costoulas, Sofia 2005 births Living people 21st-century Belgian sportswomen Belgian female tennis players Belgian people of Greek descent Belgian sportspeople of Democratic Republic of the Congo descent Sportspeople from Genk