ATP Tour
Stefan Kozlov
#290
ATP World Ranking - 195 pts
Player Archetype
🪃 Counterpuncher
Turns defense into offense. Absorbs pace, redirects with precision, and thrives in long rallies by letting opponents beat themselves. Excels at converting break points when they matter most.
Elite BP conversionStrong return gameDefensive consistencyRally tolerance
Strong against
🧱 The Wall55%
⚔️ The Gladiator53%
Weak against
🤖 Servebot45%
🎯 Baseliner46%
Player Overview
Age
28
Height
6'0" (183 cm)
Weight
79 kg (174 lbs)
Plays
Right-Handed, Two-Handed BH
Turned Pro
2013
Career-High Ranking
#103 (2022-07-18)
Record 2015-2026
258
Wins
219
Losses
54.1%
Win %
0
Titles
Win / Loss by Year
Career record broken down by surface
| Year | Summary | Clay | Hard | Grass |
|---|---|---|---|---|
| 2026 | 25/27 | 6/6 | 16/20 | 3/1 |
| 2025 | 20/12 | 5/2 | 15/9 | 0/1 |
| 2024 | 36/17 | 17/8 | 19/9 | - |
| 2023 | 6/10 | - | 6/10 | - |
| 2022 | 24/34 | 0/4 | 20/23 | 4/7 |
| 2021 | 42/15 | 0/2 | 42/13 | - |
| 2020 | 7/8 | - | 7/8 | - |
| 2019 | 15/15 | 1/2 | 14/13 | - |
| 2018 | 13/26 | 7/6 | 5/16 | 1/4 |
| 2017 | 31/28 | 8/8 | 18/15 | 5/5 |
| 2016 | 38/28 | 8/5 | 26/18 | 4/5 |
| 2015 | 10/15 | 0/3 | 8/10 | 2/2 |
| Career | 267/235 | 52/46 | 196/164 | 19/25 |
Serve & Return
Averages · Last 90 days (10 matches)
Serve
1st Serve In-
1st Serve Pts Won-
2nd Serve Pts Won-
Break Points Saved-
Aces / Match1.4
Double Faults / Match2.4
Avg 1st Serve-
Max Serve Speed-
Return
1st Return Pts Won-
2nd Return Pts Won-
Break Points Converted-
Rally
Winners / Match-
Unforced Errors / Match-
Net Pts Won %-
Total Pts Won %-
Prop Research
Career hit rates on common betting markets · 246 serve-stat matches
Stefan Kozlov has served 3+ aces in 42.7% of career matches and 5+ aces in 22.4%.
Ace Totals
| Outcome | Hit rate | Matches |
|---|---|---|
| 1 or more | 81% | 200/246 |
| 3 or more | 43% | 105/246 |
| 5 or more | 22% | 55/246 |
| 10 or more | 1% | 3/246 |
| 15 or more | 0% | 0/246 |
| 20 or more | 0% | 0/246 |
Double Fault Totals
| Outcome | Hit rate | Matches |
|---|---|---|
| 1 or more | 94% | 232/246 |
| 2 or more | 81% | 199/246 |
| 3 or more | 65% | 160/246 |
| 5 or more | 36% | 88/246 |
| 8 or more | 9% | 23/246 |
| 10 or more | 3% | 7/246 |
Total Sets
| Outcome | Hit rate | Matches |
|---|---|---|
| 2 Sets | 62% | 310/501 |
| 3 Sets | 37% | 187/501 |
Set Betting
| Outcome | Hit rate | Matches |
|---|---|---|
| 2-0 | 30% | 152/501 |
| 2-1 | 22% | 111/501 |
| 1-2 | 14% | 72/501 |
| 0-2 | 31% | 156/501 |
Match/Set Winner
| Outcome | Hit rate | Matches |
|---|---|---|
| 1st Set Winner | 49% | 246/501 |
| 2nd Set Winner | 50% | 250/500 |
| 3rd Set Winner | 60% | 114/190 |
Recent Matches
Last 10 results
FormLWLLL
| Date | Tournament | Round | Opponent | Surface | Score | Result |
|---|---|---|---|---|---|---|
| Oct 1, 2026 | Columbus Challenger | 2nd Round | Mitchell Krueger | Hard | 26 63 36 | L |
| Sep 29, 2026 | Columbus Challenger | 1st Round | James Kent Trotter | Hard | 63 62 | W |
| Sep 22, 2026 | San Diego 2 Challenger | 1st Round | Colton Smith | Hard | 46 26 | L |
| Sep 15, 2026 | Tiburon Challenger | 1st Round | Darwin Blanch | Hard | 36 62 67 | L |
| Aug 13, 2026 | Brownsburg Challenger | 2nd Round | Harry Wendelken | Hard | 62 46 16 | L |
| Aug 12, 2026 | Brownsburg Challenger | 1st Round | Aidan Mayo | Hard | 63 57 62 | W |
| Jul 25, 2026 | Citi Open - Washington | 1st Round Qualifying | Zachary Svajda | Hard | 57 16 | L |
| Jul 21, 2026 | Bloomfield Hills Challenger | 1st Round | Alan Magadan | Hard | 63 16 67 | L |
| Jul 20, 2026 | Bloomfield Hills Challenger | 3rd Round Qualifying | Roger Pascual Ferra | Hard | 46 46 | L |
| Jul 19, 2026 | Bloomfield Hills Challenger | 1st Round Qualifying | Leo Vithoontien | Hard | 46 61 62 | W |
Rivalries
Most-played opponents, head-to-head
Stefan Kozlov FAQ
Stefan Kozlov is ranked #290 on the ATP tour with 195 ranking points. The career-high ranking is #103, reached in 2022.
Stefan Kozlov is from United States and turned pro in 2013.
Stefan Kozlov is listed at 6'0" (183 cm). Listed weight is 79 kg (174 lb).
Stefan Kozlov is 28 years old.
Stefan Kozlov plays right-handed with a two-handed backhand.
Stefan Kozlov has a win-loss record since 2015 of 258-219 (54% win rate).
Stefan Kozlov: a career-high ranking of #103 in 2022. On tour since 2013.
Stefan Kozlov's strongest surface by win rate is hard, with a 196-164 record (54%). Surface splits: hard 196-164 (54%), clay 52-46 (53%), and grass 19-25 (43%).
Stefan Kozlov has won 3 of the last 10 completed matches (30%).
Stefan Kozlov's most-played opponents are Mitchell Krueger (10 meetings, 5-5), J.J. Wolf (9 meetings, 4-5), and Steve Johnson (8 meetings, 5-3).