Teodora Kostović ( sr-Cyrl, Теодора Костовић; born 28 June 2007) is a Serbian 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. On 21 July 2025, she reached her best singles ranking of world No. 347 on the WTA.

Early life and background

Kostović comes from a sports-focused family and has a brother named Miloš. She began playing tennis at age five and reportedly expressed an early ambition to become the world No. 1 ranked player.

Career

Junior events

Competing on the ITF Junior Circuit, Kostović achieved a career-high ranking of world No. 6. She won J300 singles titles on clay courts in

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 ...

and

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 ...

in 2023. In 2024, she claimed five J300 titles across all three major surfaces. Her victories included wins on grass in

Roehampton Roehampton is an area in southwest London, sharing its SW15 postcode with neighbouring Putney and Kingston Vale, and takes up a far western strip, running north to south, in the London Borough of Wandsworth. It contains a number of large counc ...

, on hard courts in College Park, and on clay in

Bradenton Bradenton ( ) is a city in and the county seat of Manatee County, Florida, United States. As of the 2020 census, the city's population is 55,698, up from 49,546 at the 2010 census. It is a principal city in the Sarasota metropolitan area. Dow ...

Oberpullendorf Oberpullendorf (; or ; ) is a town in Burgenland, Austria. It is the administrative center of the district of Oberpullendorf (district), Oberpullendorf. Geography Oberpullendorf is a municipality in the middle of the Burgenland. It consists o ...

, and

Bytom Bytom (Polish pronunciation: ; Silesian language, Silesian: ''Bytōm, Bytōń'', ) is a city in Upper Silesia, in southern Poland. Located in the Silesian Voivodeship, the city is 7 km northwest of Katowice, the regional capital. It is one ...

. That same year, she was also a finalist at the J500 event on clay in Offenbach, and the J300 event on hard courts in Indian Wells. In September 2024, she won the U18 European Junior Championships, defeating

Alena Kovačková Alena Kovačková (born 13 June 2008) is a Czech tennis player. She has a career-high junior combined ranking of No. 8, achieved on 10 June 2024. Personal life She has a younger sister Jana who is also tennis player. Career Junior career Whi ...

in the final. Grand Slam performance Singles: * Australian Open: 2R (

2024 The year saw the list of ongoing armed conflicts, continuation of major armed conflicts, including the Russian invasion of Ukraine, the Myanmar civil war (2021–present), Myanmar civil war, the Sudanese civil war (2023–present), Sudane ...

2025 So far, the year has seen the continuation of major armed conflicts, including the Russian invasion of Ukraine, the Sudanese civil war (2023–present), Sudanese civil war, and the Gaza war. Internal crises in Bangladesh post-resignation v ...

) * French Open: 3R (

2023 Catastrophic natural disasters in 2023 included the Lists of 21st-century earthquakes, 5th-deadliest earthquake of the 21st century 2023 Turkey–Syria earthquakes, striking Turkey and Syria, leaving up to 62,000 people dead; Cyclone Freddy ...

) * Wimbledon: QF (

) * US Open: QF (

) Doubles: * Australian Open: QF (

) * French Open: 2R (

) * Wimbledon: 2R (

) * US Open: QF (

)

2024: Senior debut

Aged 16, Kostović made her professional debut on the

ITF Women's World Tennis Tour The ITF Women's World Tennis Tour, previously known as the ITF Women's Circuit, is a series of professional tennis tournaments run by the International Tennis Federation for female professional tennis players. History It serves as a developmenta ...

in Kuršumlijska Banja, Serbia. In May 2024, she reached the singles semifinals of a W15 event there, losing in three sets to compatriot Anja Stanković. Later in 2024, she played four additional tournaments in the same town at the W15 and W75 levels, not advancing past the quarterfinals in any of them.

2025: WTA 1000 debut

Kostović made her

WTA Tour The WTA Tour (also known as the Hologic WTA Tour for sponsorship reasons) is a worldwide top-tier tennis tour for women and organized by the Women's Tennis Association. The second-tier tour is the WTA 125 series, and third-tier is the ITF Wome ...

singles debut in February 2025 at the

WTA 500 WTA 500 tournaments is a category of tennis tournaments in the Women's Tennis Association tour, implemented since the reorganization of the schedule in 2021. At their introduction in 2021, WTA 500 tournaments' prize money was approximately $500, ...

Abu Dhabi Open The Abu Dhabi Open is a WTA 500-level professional women's tennis tournament. It takes place on outdoor hardcourts, and was introduced in 2021 to be played in the month of January at the Zayed Sports City International Tennis Centre in the city ...

, entering the qualifying draw via a wildcard earned through a junior tournament result. In the first qualifying round, she won the first set 6–2 against

Diane Parry Diane Parry (; born 1 September 2002) is a French professional tennis player. On 28 October 2024, she achieved a career-high singles ranking of world No. 48. On 4 December 2023, she peaked at No. 74 in the WTA doubles rankings. She is the curre ...

before the French player retired from the match. In the final qualifying round, Kostović initially led 4–1 against

McCartney Kessler McCartney Kessler (born July 8, 1999) is an American tennis player. She has career-high WTA rankings of No. 32 in singles, and No. 152 in doubles, achieved on March 31, 2025. Kessler has won three singles titles on the WTA Tour. Early life Fro ...

but ultimately lost 4–6, 2–6. The following month, in March 2025, she received a wildcard into the qualifying rounds of the

WTA 1000 The WTA 1000 tournaments are a category of tennis tournaments on the WTA Tour, governed by the Women's Tennis Association. The old WTA Premier Mandatory and Premier 5 tournaments merged into a single highest tier implemented in the 2021 sche ...

Miami Open. Ranked No. 756 at the time, Kostović defeated world No. 99 and 17th qualifying seed

Olivia Gadecki Olivia Gadecki (; born 24 April 2002) is an Australian professional tennis player. She has a career-high singles ranking by the WTA of No. 83, reached on 7 October 2024, and a best doubles ranking of world No. 64, achieved on 22 July 2024. In ...

in the first round. She lost to

Greet Minnen Greet Minnen (born 14 August 1997) is a Belgian tennis player. Minnen has career-high WTA rankings of world No. 59 in singles and No. 45 in doubles, achieved on 16 October 2023 and on 8 January 2024, respectively. Career Juniors In her last yea ...

in the final qualifying round. In April 2025, Kostović received a wildcard for the qualifying rounds and subsequently qualified for the main draw of the WTA 1000 in

Madrid Madrid ( ; ) is the capital and List of largest cities in Spain, most populous municipality of Spain. It has almost 3.5 million inhabitants and a Madrid metropolitan area, metropolitan area population of approximately 7 million. It i ...

. She achieved this by defeating top-100 player

Elena-Gabriela Ruse Elena-Gabriela Ruse (born 6 November 1997) is a Romanian professional tennis player. She has a career-high WTA singles ranking of world No. 51 and a doubles ranking of No. 32 achieved in May 2022 and 2023 respectively. She is currently the No. ...

in the first qualifying round and then

Lucrezia Stefanini Lucrezia Stefanini (born 15 May 1998) is an Italian tennis player. Stefanini has career-high WTA rankings of 99 in singles and 393 in doubles. She has won ten singles titles and two doubles titles on the ITF Circuit. She was finalist for Italy i ...

in the final qualifying round. Entering the main draw of Madrid, Kostović, ranked No. 625, was the lowest-ranked participant aside from those using a

protected ranking This page is a glossary of tennis terminology. A * Ace (tennis), Ace: Serve where the tennis ball lands inside the ''#service box, service box'' and is not touched by the receiver; thus, a shot that is both a serve and a winner is an ace. Aces a ...

. She was also the youngest player in the main draw. In the first round, she lost to

Eva Lys Eva Lys (; born 12 January 2002) is a German professional tennis player. Lys reached a career-high singles ranking of world No. 59 on 19 May 2025. Personal life She was born in Kyiv, Ukraine, and moved to Germany at the age of 2. Her father Vlad ...

in straight sets.

Billie Jean King Cup

Kostović received her first nomination to represent

Serbia , image_flag = Flag of Serbia.svg , national_motto = , image_coat = Coat of arms of Serbia.svg , national_anthem = () , image_map = , map_caption = Location of Serbia (gree ...

in the

Billie Jean King Cup The Billie Jean King Cup (or the BJK Cup) is the premier international team competition in women's tennis, launched as the Federation Cup in 1963 to celebrate the 50th anniversary of the International Tennis Federation (ITF). The name was chan ...

in April 2025, under the captaincy of

Dušan Vemić Dušan Vemić ( sr-Cyrl, Душан Вемић; born 17 June 1976) is a Serbian tennis coach and former professional tennis player. Professional career Vemić turned professional in 1995. He reached a career-high singles ranking of world No. 1 ...

, for the Europe/Africa Zone Group I event against

Slovenia Slovenia, officially the Republic of Slovenia, is a country in Central Europe. It borders Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the south and southeast, and a short (46.6 km) coastline within the Adriati ...

and

Lithuania Lithuania, officially the Republic of Lithuania, is a country in the Baltic region of Europe. It is one of three Baltic states and lies on the eastern shore of the Baltic Sea, bordered by Latvia to the north, Belarus to the east and south, P ...

, and later in the promotional play-off tie against

Croatia Croatia, officially the Republic of Croatia, is a country in Central Europe, Central and Southeast Europe, on the coast of the Adriatic Sea. It borders Slovenia to the northwest, Hungary to the northeast, Serbia to the east, Bosnia and Herze ...

. She made her debut for the national team on 10 April 2025, recording a victory over

Klaudija Bubelytė Klaudija Bubelytė (born 29 March 2003) is a Lithuanian tennis player. Bubelytė has a career-high singles ranking by the Women's Tennis Association, WTA of 491, achieved on 11 November 2024. She also has a career-high WTA doubles ranking of 782 ...

of Lithuania.

Performance timelines

''Only main-draw results in

, Grand Slam tournaments,

United Cup The United Cup is an international hard court tennis competition featuring mixed-gender teams from 18 countries. The first event was held in December 2022 into January 2023. The event is played across multiple Australian cities over 11 days in ...

Hopman Cup The Hopman Cup is an international tennis tournament that plays mixed teams (one male and one female) on a country-by-country basis. It was first held in Perth, Western Australia each year from 1989 to 2019, played on indoor hardcourt, before b ...

and

Olympic Games The modern Olympic Games (Olympics; ) are the world's preeminent international Olympic sports, sporting events. They feature summer and winter sports competitions in which thousands of athletes from around the world participate in a Multi-s ...

are included in win–loss records.''

Singles

''Current through the

2025 Miami Open The 2025 Miami Open is a professional hardcourt tennis tournament played from March 18 to March 30, 2025, on the grounds of Hard Rock Stadium in Miami Gardens, Florida. It will be the 40th edition of the combined men's and women's event and is c ...

.''

ITF Circuit finals

Singles: 1 (runner-up)

References

External links

* * * {{DEFAULTSORT:Kostovic, Teodora Living people 2007 births Serbian female tennis players People from Novi Sad Tennis players from Novi Sad