Stefan Kozlov

Stefan Kozlov (Russian: Стефан Козлов, /ˈstɛfɑːn ˈkɒzlɒv/ STEF-ahn KOZ-lov; born February 1, 1998) is an American professional tennis player of Russian descent.

He has a career-high ATP ranking of world No. 103 achieved on 18 July 2022 and doubles ranking of world No. 180 on 19 June 2017.

Stefan Kozlov
Stefan Kozlov
Country (sports)Stefan Kozlov United States
ResidencePembroke Pines, Florida, United States
Born (1998-02-01) 1 February 1998 (age 26)
Skopje, Republic of Macedonia
Height1.83 m (6 ft 0 in)
Turned pro2013
PlaysRight-handed (two-handed backhand)
Prize money$1,005,853
Singles
Career record9–26 (25.7%)
Career titles0
Highest rankingNo. 103 (July 18, 2022)
Current rankingNo. 653 (March 18, 2024)
Grand Slam singles results
Australian Open2R (2022)
French OpenQ2 (2017)
Wimbledon1R (2022)
US Open1R (2022)
Doubles
Career record0–5
Career titles0
Highest rankingNo. 180 (June 19, 2017)
Grand Slam doubles results
US Open1R (2014)
Last updated on: March 30, 2024.

Kozlov made his ATP World Tour debut as a wildcard in 2013 Hall of Fame Tennis Championships at the age of 15. He reached two junior Grand Slam finals in 2014 and finished the year at World No. 3 in the ITF Junior Combined rankings.

Personal life

He is the son of Russian parents and his father Andrei is a tennis coach.

Junior career

In 2014, Kozlov reached two junior Grand Slam finals, where he lost to Alexander Zverev at the Australian Open and Noah Rubin at Wimbledon. This success led him to a career high junior ranking of No. 2. Kozlov also competed at the U18 National Championships, finishing in third place in the singles tournament and winning the doubles tournament with Noah Rubin. With this victory, they earned a wildcard into the main draw of the 2014 US Open. He ended the year by winning the Orange Bowl junior tournament.

In 2015, Kozlov reached the final of the U18 National Championships, where he lost to Frances Tiafoe in five sets.

Professional career

Early years

Stefan Kozlov 
Kozlov in 2016

In 2013, Kozlov made his ATP World Tour debut as a wildcard at the Newport tournament and lost in the first round. At the age of 16, he defeated his first Top 100 player in Tim Smyczek to reach his first ATP Challenger final in 2014 in Sacramento, where he lost to Sam Querrey. He also reached seven career ITF Futures finals and won four of these finals.

2016-17: First ATP win and quarterfinal, Two Challenger titles

In April, Kozlov reached the final at the Open de Guadeloupe. In June, he won his first career ATP level match as a wildcard at the 2016 Ricoh Open in Den Bosch. He reached his first career quarterfinal by defeating Steve Johnson in the second round. Toward the end of the season, Kozlov reached a second Challenger final on the year at Suzhou. He won his first career Challenger event in Columbus. He won his second title at the 2017 Las Vegas Challenger.

2021: First three Challenger titles since 2017, return to top 200 since 2018

In September, at the 2021 Columbus Challenger, Kozlov won his first title in four years, defeating Max Purcell in the final in three sets. At the same tournament he won also in doubles partnering Canadian Peter Polansky. He followed this by a final at the 2021 Las Vegas Challenger and a second Challenger title for the season at the 2021 Charlottesville Men's Pro Challenger, defeating another Australian Aleksandar Vukic. As a result, he returned to the top 200 in more than three years at No. 188 on November 8, 2021. He ended the year with winning his third Challenger in Champaign, US. As a result he finished the year ranked World No. 159 on 22 November 2021.

2022: Grand Slam debut & first win, second ATP quarterfinal & career-high ranking

At the 2022 Australian Open he made his debut as a wildcard and won his first Grand Slam match against Jiří Veselý. He lost in the second round to 7th seed Matteo Berrettini.

As a qualifier at the 2022 Delray Beach Open, he reached his second career quarterfinal after defeating Emilio Gómez and Steve Johnson.

Ranked No. 130 at the 2022 Abierto Mexicano Telcel in Acapulco, he reached the main draw as lucky loser and defeated Grigor Dimitrov in a stunning upset in three sets after fighting cramps, in the longest match in Acapulco history. It was the biggest win in his career.

At the 2022 Wimbledon Championships, he made his debut at this Major when he entered the main draw as a lucky loser after the late withdrawal of Borna Ćorić. Kozlov lost in straight sets to 12th seed Diego Schwartzman. He reached a new career high ranking of No. 103 on 18 July 2022.

ATP Challenger and ITF Futures finals

Singles: 18 (9–9)

Legend (singles)
ATP Challenger Tour (5–5)
ITF Futures Tour (4–4)
Titles by surface
Hard (9–9)
Clay (0–0)
Grass (0–0)
Result W–L    Date    Tournament Tier Surface Opponent Score
Loss 0–1 Oct 2014 Sacramento, USA Challenger Hard Stefan Kozlov  Sam Querrey 3–6, 4–6
Loss 0–2 May 2015 USA F15, Orange Park Futures Hard Stefan Kozlov  Darian King 2–6, 6–3, 0–6
Loss 0–3 May 2015 Mexico F3, Mexico City Futures Hard Stefan Kozlov  Iván Endara 1–6, 6–7(3–7)
Loss 0–4 Oct 2015 Belarus F3, Minsk Futures Hard (i) Stefan Kozlov  Dzmitry Zhyrmont 1–6, 4–6
Win 1–4 Oct 2015 Belarus F4, Minsk Futures Hard (i) Stefan Kozlov  Dzmitry Zhyrmont 6–1, 7–6(7–1)
Win 2–4 Jan 2016 USA F1, Los Angeles Futures Hard Stefan Kozlov  Philip Bester 7–6(9–7), 6–7(3–7), 6–3
Win 3–4 Mar 2016 Canada F2, Sherbrooke Futures Hard (i) Stefan Kozlov  Lloyd Glasspool 4–6, 6–4, 6–4
Loss 3–5 Apr 2016 Le Gosier, Guadeloupe Challenger Hard Stefan Kozlov  Malek Jaziri 2–6, 4–6
Win 4–5 Apr 2016 USA F13, Little Rock Futures Hard Stefan Kozlov  Eric Quigley 6–7(3–7), 6–3, 7–6(12–10)
Loss 4–6 Oct 2016 Suzhou, China Challenger Hard Stefan Kozlov  Lu Yen-hsun 0–6, 1–6
Win 5–6 Nov 2016 Columbus, USA Challenger Hard (i) Stefan Kozlov  Tennys Sandgren 6–1, 2–6, 6–2
Win 6–6 Oct 2017 Las Vegas, USA Challenger Hard Stefan Kozlov  Liam Broady 3–6, 7–5, 6–4
Loss 6–7 Mar 2019 M25 Calabasas, USA World Tennis Tour Hard Stefan Kozlov  Alexander Ritschard 2–6, 6–0, 6–7(5–7)
Win 7–7 Sep 2021 Columbus, USA Challenger Hard (i) Stefan Kozlov  Max Purcell 4–6, 6–2, 6–4
Loss 7–8 Oct 2021 Las Vegas, USA Challenger Hard Stefan Kozlov  J. J. Wolf 4–6, 4–6
Win 8–8 Nov 2021 Charlottesville, USA Challenger Hard (i) Stefan Kozlov  Aleksandar Vukic 6–2, 6–3
Win 9–8 Nov 2021 Champaign, USA Challenger Hard (i) Stefan Kozlov  Aleksandar Vukic 5–7, 6–3, 6–4
Loss 9–9 Oct 2022 Las Vegas, USA Challenger Hard Stefan Kozlov  Tennys Sandgren 5–7, 3–6

Doubles: 13 (6–7)

Legend (doubles)
ATP Challenger Tour (4–5)
ITF Futures Tour (2–2)
Titles by surface
Hard (5–3)
Clay (1–4)
Grass (0–0)
Result W–L    Date    Tournament Tier Surface Partner Opponents Score
Win 1–0 Nov 2013 USA F31, Bradenton Futures Clay Stefan Kozlov  Sekou Bangoura Stefan Kozlov  Devin McCarthy
Stefan Kozlov  Tommy Mylnikov
6–2, 6–4
Loss 1–1 May 2014 Spain F10, Vic Futures Clay Stefan Kozlov  Noah Rubin Stefan Kozlov  Sergio Martos Gornés
Stefan Kozlov  Pol Toledo Bagué
2–6, 5–7
Win 2–1 Jan 2015 Maui, USA Challenger Hard Stefan Kozlov  Jared Donaldson Stefan Kozlov  Chase Buchanan
Stefan Kozlov  Rhyne Williams
6–3, 6–4
Loss 2–2 Oct 2015 Croatia F18, Solin Futures Clay Stefan Kozlov  Nino Serdarušić Stefan Kozlov  Zdeněk Kolář
Stefan Kozlov  Tomas Toman
4–6, 6–2, [6–10]
Win 3–2 Mar 2016 Canada F1, Gatineau Futures Hard (i) Stefan Kozlov  Kaichi Uchida Stefan Kozlov  Sebastian Fanselow
Stefan Kozlov  Adrian Sikora
7–6(7–5), 6–3
Win 4–2 Jul 2016 Winnetka, USA Challenger Hard Stefan Kozlov  John-Patrick Smith Stefan Kozlov  Sekou Bangoura
Stefan Kozlov  David O'Hare
6–3, 6–3
Loss 4–3 Sep 2016 Cary, USA Challenger Hard Stefan Kozlov  Austin Krajicek Stefan Kozlov  Philip Bester
Stefan Kozlov  Peter Polansky
2–6, 2–6
Loss 4–4 Oct 2016 Ningbo, China Challenger Hard Stefan Kozlov  Akira Santillan Stefan Kozlov  Jonathan Eysseric
Stefan Kozlov  Sergiy Stakhovsky
4–6, 6–7(4–7)
Loss 4–5 Apr 2017 Sarasota, USA Challenger Clay Stefan Kozlov  Peter Polansky Stefan Kozlov  Scott Lipsky
Stefan Kozlov  Jürgen Melzer
2–6, 4–6
Win 5–5 Jul 2021 Lexington, USA Challenger Hard Stefan Kozlov  Liam Draxl Stefan Kozlov  Alex Rybakov
Stefan Kozlov  Reese Stalder
6–2, 6–7(5–7), [10–7]
Loss 5–6 Sep 2021 Cary, USA Challenger Hard Stefan Kozlov  Peter Polansky Stefan Kozlov  William Blumberg
Stefan Kozlov  Max Schnur
4–6, 6–1, [4–10]
Win 6–6 Sep 2021 Columbus, USA Challenger Hard (i) Stefan Kozlov  Peter Polansky Stefan Kozlov  Andrew Lutschaunig
Stefan Kozlov  James Trotter
7–5, 7–6(7–5)
Loss 6–7 Mar 2024 Mérida, Mexico Challenger Clay Stefan Kozlov  Boris Kozlov Stefan Kozlov  Thomas Fancutt
Stefan Kozlov  Hunter Reese
5–7, 3–6

Junior Grand Slam finals

Singles: 2 (2 runner-ups)

Result Year Championship Surface Opponent Score
Loss 2014 Australian Open Hard Stefan Kozlov  Alexander Zverev 3–6, 0–6
Loss 2014 Wimbledon Grass Stefan Kozlov  Noah Rubin 6–4, 4–6, 3–6

Doubles: 1 (1 runner-up)

Result Year Championship Surface Partner Opponents Score
Loss 2014 Wimbledon Grass Stefan Kozlov  Andrey Rublev Stefan Kozlov  Orlando Luz
Stefan Kozlov  Marcelo Zormann
4–6, 6–3, 6–8

References

Tags:

Stefan Kozlov Personal lifeStefan Kozlov Junior careerStefan Kozlov Professional careerStefan Kozlov ATP Challenger and ITF Futures finalsStefan Kozlov Junior Grand Slam finalsStefan Kozlov

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