Kristina "Kiki" Mladenovic (born 14 May 1993) is a French professional tennis player and a former world No. 1 in doubles. Her best singles ranking is world No. 10. She is a ten-time Grand Slam champion, having won the 2016 and 2022 French Open women's doubles titles, partnering Caroline Garcia, and the 2018 Australian Open, 2019 and 2020 French Opens and 2020 Australian Open with Tímea Babos as well as the 2026 Wimbledon Championships, partnering with Guo Hanyu.
In mixed doubles, Mladenovic won the 2013 Wimbledon Championships and 2014 Australian Open alongside Daniel Nestor, and the 2022 Australian Open with Ivan Dodig. She has also reached a further six major finals across women's and mixed doubles. Mladenovic became world No. 1 in doubles for the first time in June 2019, and has held the top ranking for a total of 12 weeks. She has won 30 career doubles titles, including the 2018 and 2019 WTA Finals and four at WTA 1000 level.
Mladenovic has also enjoyed success in singles, and reached her career-high ranking of world No. 10 in October 2017. She has won one WTA Tour singles title, at the 2017 St. Petersburg Trophy, and finished runner-up on seven occasions. Her best Grand Slam performance was reaching the quarterfinals at the 2015 US Open and the 2017 French Open.
Mladenovic has represented France in the Fed Cup and Billie Jean King Cup since 2012, and was part of the team which won the competition in 2019. She has also competed at the Olympic Games on three occasions.
Personal life Kristina Mladenovic was born in Saint-Pol-sur-Mer, in the Nord department of France. Her father is Dragan Mladenović, a former Serbian and Yugoslav handball player, and her mother Dženita Helić is a Serbian former volleyball player. They moved to France in 1992 when Dragan was signed by Dunkerque HGL. All became French citizens. Mladenovic has a brother named Luka. She dated Austrian tennis player Dominic Thiem from the middle of 2017 until the couple split in November 2019.
Career 2006–2008: Beginnings Mladenovic started playing juniors in May 2006. In 2007, she became the European Under-14 singles champion. Her biggest junior achievement was at the 2009 French Open girls' singles, where she beat Daria Gavrilova of Russia in two sets in the final. Mladenovic began playing on the ITF Women's Circuit in September 2007.
On the WTA Tour, she tried to qualify for 2008 Open Gaz de France but lost her first match to Petra Kvitová.
2009: World No. 1 junior, major and WTA Tour debuts Mladenovic turned professional in 2009, making her Grand Slam debut at that year's Australian Open where she received a wildcard but was defeated by 14th seed Patty Schnyder.
Her highest junior ranking was world No. 1 on 8 June 2009. She advanced to both the girls' singles and doubles finals at the 2009 Wimbledon Championships, losing to Noppawan Lertcheewakarn in the singles. In doubles, with partner Silvia Njirić, lost also to Lertcheewakarn, who partnered with Sally Peers.
In July, she qualified for the 2009 Prague Open and lost in the first round to Zarina Diyas of Kazakhstan.
At the Internationaux de Strasbourg, Mladenovic won her first match on the WTA Tour, coming back from 2–5 in the final set to win the tiebreak against Stefanie Vögele.
Mladenovic played for France at the 2011 Hopman Cup, partnering with Nicolas Mahut. France was drawn in the same group as the United States, Great Britain, and Italy. Mladenovic beat Francesca Schiavone and Laura Robson while losing to Bethanie Mattek-Sands in the singles matches. In the mixed doubles, she and Mahut won one of their three matches.
In 2011, she won her first women's title at a $25k tournament in Sutton, defeating Mona Barthel. This was followed by a win in Stockholm the following week, defeating Arantxa Rus in the final.
2012: Breakthrough At the start of the year, Mladenovic linked up with Biljana Veselinovic but they split just before Wimbledon and since then she had been coached by Thierry Ascione. She claimed her first WTA Tour title of any type in Montreal when she and Klaudia Jans-Ignacik won the doubles title at the Rogers Cup. Mladenovic made it through to the third round of the US Open by defeating Pavlyuchenkova. At the Bell Classic in Québec, she reached her first WTA Tour semifinal with Tatjana Malek, and won her second career doubles title. Following her run, she entered the top 100 in the rankings for the first time. Mladenovic won the first ever WTA 125 event, the Taipei Ladies Open, and took the doubles crown as well.
2013: First major mixed doubles title
At the Open GdF Suez, a Premier tournament, Mladenovic made the semifinals, including defeating Petra Kvitová. Teaming with Daniel Nestor, she made it to the final of the French Open in mixed doubles where they were defeated. However, she and Nestor rebounded at the mixed doubles at Wimbledon, capturing her first Grand Slam title.
At the 2013 US Open, she beat Anabel Medina Garrigues in the first round and then lost to the 23rd seed Jamie Hampton in two sets. Mladenovic partnered up with Daniel Nestor to reach the semifinals of the mixed doubles, where they were defeated by the seventh-seeded team of Max Mirnyi and Andrea Hlaváčková in a close three-setter.
2014: Australian Open mixed doubles champion Mladenovic started 2014 off strong, capturing her second mixed-doubles title at the Australian Open partnering again with Nestor. At the Open GdF Suez, she defeated Australian Open quarterfinalist Simona Halep in the first round. Partnering Daniel Nestor she won her second major title in the mixed doubles event.
At Roland Garros, she upset Li Na (world No. 2 and 2011 champion) in the first round, her first top-5 win. She continued her strong performance with a three-set win over Alison Riske in the second round. In the round of 32, she was beaten by eventual semifinalist Andrea Petkovic. Mladenovic opened her grass-court season in Birmingham, but lost her opening match to Shahar Pe'er. She then competed in 's-Hertogenbosch qualifying, managing to win a round but ultimately falling to CoCo Vandeweghe, who would go on to qualify and win the entire tournament. At Wimbledon, she drew Zarina Diyas in the first round, but fell to the Kazakh in a rain delayed straight-set encounter. In the doubles draw, Mladenovic partnered Tímea Babos, and reached their first Grand Slam women's doubles final, ultimately losing to Sara Errani and Roberta Vinci in straight sets. She then stunned at the İstanbul Cup the third seed Klára Koukalová, but lost in the semifinals to No. 1 seed Caroline Wozniacki. Her strong run returned her to the top 100, at No. 81. At Baku, she lost in quarterfinals, losing to Francesca Schiavone in a rematch of the İstanbul Cup quarterfinals. She next competed at the Washington Open, where she stunned top seeded Lucie Šafářová, before defeating qualifier Taylor Townsend. She lost to Kurumi Nara in the quarterfinals. Mladenovic lost in the final round of qualifying to Yanina Wickmayer in Montréal, and also the first round of qualifying in Cincinnati. She played doubles in Montréal, losing in the first round with partner Tímea Babos.
2015: Major quarterfinal, top 30 in singles
Mladenovic began the year losing in the second round of the Australian Open to Bethanie Mattek-Sands. She, along with Daniel Nestor, reached the final of the mixed-doubles event. She lost in the second round of the Diamond Games in Antwerp to Lucie Šafářová.
She reached the semifinals of Marrakesh, losing to her doubles partner Tímea Babos. She reached the singles final in Strasbourg, her first ever WTA Tour singles final, where she lost to Samantha Stosur. Her strong showing at both tournaments ensured her entry into the top 50 of the WTA singles rankings.
At the French Open, Mladenovic once again stunned a top-10 player in her opening match by defeating world No. 6, Eugenie Bouchard. She advanced to the third round with a victory over Danka Kovinić but lost to Alison Van Uytvanck in straight sets while fighting for a spot in the last 16.
At the Rosmalen Open, Mladenovic lost to eventual finalist and good friend Belinda Bencic, despite having match points. At the Birmingham Classic, she beat Bouchard again (3–6, 6–4, 6–0), and then once again stunned a top-10 player by defeating world No. 3, Simona Halep, 2–6, 6–0, 7–6.
At the US Open, she reached the quarterfinals with wins over Svetlana Kuznetsova, Bojana Jovanovski, lucky loser Daria Kasatkina and Ekaterina Makarova before losing to eventual finalist Roberta Vinci in the quarterfinals, and entered the top 30 of the WTA singles rankings for the first time in her career.
2016: French Open doubles champion
In May, Mladenovic reached the singles semifinals of the Internationaux de Strasbourg, but lost to Mirjana Lučić-Baroni.
At the French Open, Mladenovic won her first-round match against the 2010 French Open singles champion Francesca Schiavone, and defeated her former doubles partner Tímea Babos in the second. She lost in the third round to world No. 1 and defending champion, Serena Williams, in two sets, after having a set point at 9–8 in the tiebreak. Mladenovic won the doubles event partnering Caroline Garcia, beating Ekaterina Makarova and Elena Vesnina in the final. It was the first Grand Slam women's doubles crown for Garcia and Mladenovic, and they became the first all-French pair to win the French Open women's doubles title since Gail Chanfreau and Françoise Dürr in 1971. In June, Mladenovic reached her second tour singles final at the Rosmalen Grass Court Championships in which she lost to CoCo Vandeweghe.
Mladenovic participated in the singles, doubles and mixed-doubles events of the London Olympics. In the women's singles, she was defeated in the second round by Madison Keys. In the women's doubles event, Mladenovic partnered Caroline Garcia, with whom she had won the French Open in June. Despite being seeded second, the French duo lost in the first round. Mladenovic (she was paired with Pierre-Hugues Herbert and they were seeded second) also lost in the first round of the mixed-doubles event.
At the US Open singles event, Mladenovic cleared the first round before falling to Anastasia Pavlyuchenkova in the second, where she played one of the longest sets in tournament history (since the advent of the tiebreak in 1970), the third set running a whopping 94 minutes. In doubles, Mladenovic (partnered with Garcia) reached the final, where the French team was defeated by Bethanie Mattek-Sands and Lucie Šafářová. This allowed Garcia and Mladenovic to qualify for the WTA Finals, becoming the second doubles team yet to do so.
Mladenovic moved on to the Asian swing, starting at the Korea Open. Seeded No. 4, Mladenovic had a surprise loss against Sara Sorribes Tormo, the 139th player in the world. Next, at the Wuhan Open, she faced world No. 1, Angelique Kerber in the second round. Kerber won the match, although Mladenovic captured the first set. In doubles, Mladenovic partnered with Garcia again, and the team was seeded No. 1. Despite this, the French women lost their opening match against Christina McHale and Peng Shuai. In Beijing, Mladenovic defeated Jelena Janković in the first round, before facing eighth seed Madison Keys. Keys won in straight sets. In doubles, Mladenovic and Garcia, once again the No. 1 seeds, made their way to the final, in which they faced Mattek-Sands and Šafářová, in a rematch of the US Open final a few weeks earlier. Mattek-Sands and Šafářová won the final in two sets.
Mladenovic had success in singles at the Hong Kong Open. An unseeded player, she reached the semifinals after defeating doubles rival Mattek-Sands in the quarterfinals. She passed No. 8 seed Daria Gavrilova to enter her second singles final of the year in which she was defeated by former No. 1 Wozniacki.