Stefan Kozlov – ATP #319 – Player Profile, Match Statistics & Bio

Q: What is Stefan Kozlov's record by surface?

Over his career at ATP level, Stefan Kozlov holds a record of 5-8 (38.5%) on grass, 4-17 (19.0%) on hard, and 0-1 on clay. At Challenger/ITF level: 223-136 (62.1%) on hard, 73-52 (58.4%) on clay, and 2-7 (22.2%) on grass. In the last 52 weeks: 19-11 (63.3%) on hard, 7-6 (53.8%) on clay, and 0-1 on grass at Challenger/ITF level.

Q: How many titles has Stefan Kozlov won?

Stefan Kozlov has won 10 titles at Challenger/ITF level (all on hard).

Q: What is Stefan Kozlov's recent form?

Over the past 10 matches, he holds a 5-5 record. Over the past 52 weeks, Stefan Kozlov has posted a 26-19 record (57.8% win rate). His last match was 4 weeks ago.

Q: How many aces does Stefan Kozlov serve per match?

Stefan Kozlov serves an average of 2.7 aces per match in the last 52 weeks, consistent with his career average of 2.7.

Q: How does Stefan Kozlov perform against top-ranked opponents?

In the last 52 weeks, Stefan Kozlov is 0-1 against Top 100 opponents. Over his career: 0-6 (0.0%) against Top 20 opponents. Against Top 50 opponents: 3-14 (17.6%). Against Top 100 opponents: 17-42 (28.8%).

Stefan Kozlov

Age: 28 (01-02-1998)

Hand: Right

Highest ranked: 103

ATP

#319

Current Ranking

LAST 52 WEEKS

26 - 19

57.8% wins

🔍 Player Bio

Stefan Kozlov neutralizes opponents winning 38.0% on first serve return. Currently ranked 273 in the ATP. Furthermore, he capitalizes on 48.0% of breakpoint opportunities. Also, he thrives in big moments at 45.9% on return pressure points. However, he wins only 56.3% of pressure points when serving.

Stefan Kozlov, from United States, is a professional tennis player currently ranked world No. 285 on the ATP Tour. He plays right-handed. His career-best ranking stands at No. 103. He turned professional in 2012.

Stefan Kozlov gained ranking points at Futures level in 2025. He captured one title at Champaign Challenger. Season record: 22-10. Record on hard in lower tier: 16-7. He won 67% on first serve, won 46% return pressure points, and won 57% serve pressure points.

Stefan Kozlov competed at Futures/ITF level in 2024. He reached three semifinals at Kigali 1 Challenger, Tallahassee Challenger, and Bloomfield Hills Challenger. Record: 35-17. Challenger/ITF surface breakdown: clay 17-7, hard 18-10. He saved 61% of break points, won 66% on first serve, and won 55% on second serve return.

Kozlov competed in just 12 matches during 2023. The campaign was limited to 12 matches. He reached the quarterfinal at Cleveland Challenger. Season record: 5-7. Challenger/ITF results on hard: 5-7. He won 65% on first serve, averaged 0.46 double faults per game, and saved 66% of break points.

Stefan Kozlov faced difficulties in 2022. He reached the final at Las Vegas Challenger. Record: 15-24. Challenger record: 11-16. Record on hard in lower tier: 10-11. He averaged 0.44 double faults per game, saved 55% of break points, and won 32% on first serve return.

2021 was a standout year for Stefan Kozlov. He won three titles at Columbus Challenger, Champaign Challenger, and Charlottesville Challenger. He also reached finals at M15 Weston FL and Las Vegas Challenger. Season record: 36-13. Challenger/ITF hard record: 31-9. He converted 44% of break opportunities, won 53% on second serve, and averaged 0.30 double faults per game.

Kozlov developed through Futures tournaments in 2020. He reached two semifinals at M25 Porto and Ann Arbor Challenger. Record: 12-12. Challenger/ITF results on hard: 12-11. He won 51% on second serve return, won 67% on first serve, and won 52% on second serve.

The American gained ranking points at Futures level in 2019. He reached the final at M25 Calabasas CA. Season record: 22-17. Record on hard in lower tier: 18-13. He won 51% on second serve return, won 36% on first serve return, and averaged 0.44 double faults per game.

2018 proved challenging for Stefan Kozlov. He reached two quarterfinals at Bordeaux Challenger and Sarasota Challenger. Record: 8-19. Challenger/ITF hard record: 3-11. He converted 44% of break opportunities, won 51% on second serve return, and won 62% on first serve.

A tough 2017 season for Kozlov. He captured one title at Las Vegas Challenger. Season record: 22-22. Challenger record: 20-14. Challenger/ITF results by surface: clay 7-7, hard 13-6. He won 50% on second serve, won 56% on second serve return, and saved 53% of break points.

The American accumulated points at Challenger events in 2016. He broke into the top 200. He won four titles at USA F1, USA F13, Canada F2, and Columbus Challenger. He also reached finals at Suzhou Challenger and Le Gosier Challenger. Record: 57-27. Challenger record: 54-24. By Challenger/ITF surface: clay 10-5, hard 43-18. He won 49% on second serve, saved 61% of break points, and won 34% on first serve return.

Stefan Kozlov competed at Futures/ITF level in 2015. He captured one title at Belarus F4. He also reached finals at USA F15, Mexico F3, and Belarus F3. Additional semifinals at Mexico F4 and Croatia F18. Season record: 35-21. Challenger/ITF surface breakdown: clay 7-4, hard 28-15. He won 66% on first serve, won 37% on first serve return, and won 51% on second serve return.

Stefan Kozlov developed through Futures tournaments in 2014. He reached the final at Sacramento. Record: 11-9. Challenger/ITF results on hard: 9-6. He won 50% on second serve return, averaged 0.09 double faults per game, and saved 70% of break points.

Stefan Kozlov gained ranking points at Futures level in 2013. He reached three quarterfinals at USA F27, USA F30, and USA F31. Season record: 8-8. Record on clay in lower tier: 5-5.

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Strong favourite: self odd < 1.20

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Clear favourite: self odd 1.20-1.50

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Slight favourite: self odd > 1.50

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Not a favourite: rival's odd > 1.50

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Not a favourite: rival's odd 1.20-1.50

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Pre-match underdog: rival's odd < 1.20

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Stefan Kozlov Match History - All Surfaces

Show: entries

Showing 1 to 25 of 34 matches

Date	Tournament	Rival	Round	Score	Self Odd	Rival's Odd	Rival's Rank	1st Srv Acc %	1st Srv Pts %	2nd Srv Pts %	Aces	DFs	BPs Saved	Srv Games Won	Ret 1st Pts %	Ret 2nd Pts %	BPs Conv	Ret Games Won

Pressure Points Performance

Pressure Points % won on serve

Pressure Points % won on return

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Pressure Points average count in service game

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Pressure Points average count in return game

Service games won % from the score

Return games won % from the score

Pressure Points Performance - All Surfaces

Show: matches

Showing 1 to 10 of 34 matches

Date	Tournament	Rival	Round	Score	Type	Pressure Points	Games won from the score:
Date	Tournament	Rival	Round	Score	Type	Pressure Points	0-30	0-40	15-30	15-40	30-30	30-40	Deuce	40-A

Common Questions About Stefan Kozlov

What is Stefan Kozlov's record by surface?

Over his career at ATP level, Stefan Kozlov holds a record of 5-8 (38.5%) on grass, 4-17 (19.0%) on hard, and 0-1 on clay. At Challenger/ITF level: 223-136 (62.1%) on hard, 73-52 (58.4%) on clay, and 2-7 (22.2%) on grass. In the last 52 weeks: 19-11 (63.3%) on hard, 7-6 (53.8%) on clay, and 0-1 on grass at Challenger/ITF level.

How many titles has Stefan Kozlov won?

Stefan Kozlov has won 10 titles at Challenger/ITF level (all on hard).

What is Stefan Kozlov's recent form?

Over the past 10 matches, he holds a 5-5 record. Over the past 52 weeks, Stefan Kozlov has posted a 26-19 record (57.8% win rate). His last match was 4 weeks ago.

How many aces does Stefan Kozlov serve per match?

Stefan Kozlov serves an average of 2.7 aces per match in the last 52 weeks, consistent with his career average of 2.7.

How does Stefan Kozlov perform against top-ranked opponents?

In the last 52 weeks, Stefan Kozlov is 0-1 against Top 100 opponents. Over his career: 0-6 (0.0%) against Top 20 opponents. Against Top 50 opponents: 3-14 (17.6%). Against Top 100 opponents: 17-42 (28.8%).