Stefan Kozlov

Stefan Kozlov
Country (sports)	United States
Residence	Pembroke Pines, Florida, United States
Born	1 February 1998 (age 23); Skopje, Republic of Macedonia
Height	1.83 m (6 ft 0 in)
Turned pro	2013
Plays	Right-handed (two-handed backhand)
Prize money	$584,068
Singles
Career record	5–18 (21.7%)
Career titles	0
Highest ranking	No. 115 (20 February 2017)
Current ranking	No. 159 (22 November 2021)
Grand Slam Singles results
Australian Open	Q3 (2018)
French Open	Q2 (2017)
Wimbledon	Q2 (2017, 2018)
US Open	Q2 (2014)
Doubles
Career record	0–5
Career titles	0
Highest ranking	No. 180 (19 June 2017)
Current ranking	No. 312 (8 November 2021)
Grand Slam Doubles results
US Open	1R (2014)
	Last updated on: 8 November 2021.

Stefan Kozlov (/ˈstɛfɑːn ˈkɒzlɒv/ STEF-ahn KOZ-lov;^[1]^[2] born 1 February 1998) is an American professional tennis player of Russian descent. He is the son of Russian parents and his father Andrei is a tennis coach.^[3]

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

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.^[4] 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 wild card into the main draw of the 2014 US Open. He ended the year by winning the Orange Bowl junior tournament.^[5]

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

Professional career[]

Early years[]

Kozlov made his ATP World Tour debut as a wild card at the Newport tournament in 2013 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 Sacramento, where he lost to Sam Querrey. He has also reached seven career ITF Futures finals and won four of these finals.

2016: First ATP win and Challenger title[]

In April, Kozlov reached the final at the Open de Guadeloupe. In June, he won his first career ATP level match as a wild card at the Rosmalen Grass Court Championships in Den Bosch. Toward the end of the season, Kozlov reached a second Challenger final on the year at Suzhou. He won his first career Challenger event at Columbus.

2021: First two 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.^[6] 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 8 November 2021.

Performance timeline[]

**Key**
W	F	SF	QF	#R	RR	Q#	DNQ	A	NH

(W) Won; (F) finalist; (SF) semifinalist; (QF) quarterfinalist; (#R) rounds 4, 3, 2, 1; (RR) round-robin stage; (Q#) qualification round; (DNQ) did not qualify; (A) absent; (NH) not held. SR=strike rate (events won/competed)

To avoid confusion and double counting, these charts are updated at the conclusion of a tournament or when the player's participation has ended.

Singles[]

Tournament	2014	2015	2016	2017	2018	2019	2020	2021	SR	W–L	Win %
Grand Slam tournaments
Australian Open	A	A	A	Q1	Q3	A	A	A	0 / 0	0–0	–
French Open	A	A	A	Q2	Q1	A	A	A	0 / 0	0–0	–
Wimbledon	A	A	Q1	Q2	Q2	A	NH	A	0 / 0	0–0	–
US Open	Q2	Q1	Q1	Q1	A	Q1	A	Q1	0 / 0	0–0	–
Win–Loss	0–0	0–0	0–0	0–0	0–0	0–0	0–0	0–0	0 / 0	0–0	–
ATP Tour Masters 1000
Indian Wells Masters	Q1	A	A	1R	Q1	A	NH	Q2	0 / 1	0–1	0%
Miami Open	A	A	A	Q2	Q1	A	NH	A	0 / 0	0–0	–
Monte-Carlo Masters	A	A	A	A	A	A	NH	A	0 / 0	0–0	–
Madrid Open	A	A	A	A	A	A	NH	A	0 / 0	0–0	–
Italian Open	A	A	A	A	A	A	A	A	0 / 0	0–0	–
Canadian Open	A	A	A	A	A	A	NH	A	0 / 0	0–0	–
Cincinnati Masters	A	Q1	Q2	1R	A	A	A	A	0 / 1	0–1	0%
Shanghai Masters	A	A	A	A	A	A	NH		0 / 0	0–0	–
Paris Masters	A	A	A	A	A	A	A	A	0 / 0	0–0	–
Win–Loss	0–0	0–0	0–0	0–2	0–0	0–0	0–0	0–0	0 / 2	0–2	0%

Challenger and Futures finals[]

Singles: 17 (9–8)[]

Legend (Singles)
ATP Challenger Tour (5–4)
ITF Futures Tour (4–4)

Titles by Surface
Hard (9–8)
Clay (0–0)
Grass (0–0)

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

Doubles: 12 (6–6)[]

Legend (Doubles)
ATP Challenger Tour (4–4)
ITF Futures Tour (2–2)

Titles by Surface
Hard (5–3)
Clay (1–3)
Grass (0–0)

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