Player
🇺🇸 stefan kozlov
Career matches 606
Wins 336
Losses 270
Win rate 55.4%
Elo (current) 2,170 2026-04-22
Surface breakdown
Hard 56.5% 248W – 191L (439 matches)
Clay 56.8% 75W – 57L (132 matches)
Grass 37.1% 13W – 22L (35 matches)
Career form (last 10)
WLLWWWLLLW
Newest on left. Hover for details.
Head-to-head (top 5 opponents)
| Opponent | Played | W | L | W% |
|---|---|---|---|---|
| j j wolf | 10 | 5 | 5 | 50% |
| mitchell krueger | 10 | 5 | 5 | 50% |
| tennys sandgren | 9 | 6 | 3 | 67% |
| steve johnson | 8 | 5 | 3 | 63% |
| darian king | 7 | 1 | 6 | 14% |
Recent matches
1–50 of 606
| Date | Tournament | Round | Winner | Loser | Score | Surface |
|---|---|---|---|---|---|---|
| 2026-04-20 | Savannah | Round of 32 | stefan kozlov | daniil glinka | 6-2 6-3 | Clay |
| 2026-04-20 | Savannah | Round of 16 | nick hardt | stefan kozlov | 6-2 2-6 6-0 | Clay |
| 2026-04-13 | Tallahassee | Round of 32 | alex rybakov | stefan kozlov | 7-6(3) 6-2 | Clay |
| 2026-04-13 | Tallahassee | 2nd Round Qualifying | stefan kozlov | kilian feldbausch | 6-1 4-6 7-6(2) | Clay |
| 2026-04-13 | Tallahassee | 1st Round Qualifying | stefan kozlov | strong kirchheimer | 6-0 6-4 | Clay |
| 2026-04-06 | Mexico City | Round of 32 | stefan kozlov | raphael perot | 6-3 6-1 | Clay |
| 2026-04-06 | Mexico City | Round of 16 | james duckworth | stefan kozlov | 6-3 6-2 | Clay |
| 2026-03-30 | San Luis Potosi | Round of 32 | alan magadan | stefan kozlov | 6-3 7-6(7) | Clay |
| 2026-03-23 | Morelia | Round of 32 | andres martin | stefan kozlov | 6-2 6-2 | Hard |
| 2026-03-16 | Morelos | Round of 32 | stefan kozlov | alan magadan | 6-4 6-4 | Hard |
| 2026-03-16 | Morelos | Round of 16 | michael mmoh | stefan kozlov | 7-5 6-2 | Hard |
| 2026-03-10 | Phoenix | Round of 32 | jay friend | stefan kozlov | 6-2 4-6 6-3 | Hard |
| 2026-03-10 | Phoenix | 2nd Round Qualifying | stefan kozlov | marc polmans | 6-1 3-6 6-4 | Hard |
| 2026-03-10 | Phoenix | 1st Round Qualifying | stefan kozlov | nathan ponwith | 7-5 6-4 | Hard |
| 2026-02-23 | Acapulco | 1st Round Qualifying | patrick kypson | stefan kozlov | 7-6(3) 6-0 | Hard |
| 2026-02-16 | Metepec | Round of 32 | stefan kozlov | tristan mccormick | 6-3 6(4)-7 6-4 | Hard |
| 2026-02-16 | Metepec | Round of 16 | stefan kozlov | karl poling | 6-4 7-6(4) | Hard |
| 2026-02-16 | Metepec | Quarterfinals | rodrigo pacheco mendez | stefan kozlov | 6-4 6-2 | Hard |
| 2026-02-02 | Cleveland | Round of 32 | stefan kozlov | cedrik marcel stebe | 3-6 6-2 6-3 | Hard |
| 2026-02-02 | Cleveland | Round of 16 | stefan kozlov | raphael perot | 7-6(5) 3-6 6-3 | Hard |
| 2026-02-02 | Cleveland | Quarterfinals | keegan smith | stefan kozlov | 6-3 6-2 | Hard |
| 2026-01-27 | San Diego | Round of 32 | sho shimabukuro | stefan kozlov | 6-2 4-6 7-6(5) | Hard |
| 2026-01-19 | Oeiras | Round of 32 | stefan kozlov | alexis galarneau | 7-6(2) 2-6 6-1 | Hard |
| 2026-01-19 | Oeiras | Round of 16 | francesco passaro | stefan kozlov | 6-3 1-6 6-1 | Hard |
| 2026-01-19 | Oeiras | 2nd Round Qualifying | stefan kozlov | mikhail kukushkin | 6-4 6-2 | Hard |
| 2026-01-19 | Oeiras | 1st Round Qualifying | stefan kozlov | robert strombachs | 6-3 5-0 RET | Hard |
| 2026-01-12 | Glasgow | Round of 32 | harry wendelken | stefan kozlov | 6-1 3-6 6-4 | Hard |
| 2026-01-05 | Nottingham | Round of 32 | stefan kozlov | tyler zink | 6-4 6-1 | Hard |
| 2026-01-05 | Nottingham | Round of 16 | stefan kozlov | mathys erhard | 6-2 6-4 | Hard |
| 2026-01-05 | Nottingham | Quarterfinals | toby samuel | stefan kozlov | 7-6(1) 6-4 | Hard |
| 2025-11-24 | Bogota#3041 | Round of 32 | stefan kozlov | juan bautista torres | 6-0 4-6 6-3 | Clay |
| 2025-11-24 | Bogota#3041 | Round of 16 | stefan kozlov | david jorda sanchis | 6-4 6-4 | Clay |
| 2025-11-24 | Bogota#3041 | Quarter-Finals | juan sebastian gomez | stefan kozlov | 4-6 6-4 7-5 | Clay |
| 2025-11-10 | Champaign | Semi-Finals | stefan kozlov | cedrik marcel stebe | 6-0 4-0 RET | Hard |
| 2025-11-10 | Champaign | Round of 32 | stefan kozlov | leo borg | 6-1 6-0 | Hard |
| 2025-11-10 | Champaign | Round of 16 | stefan kozlov | tyler zink | 6-3 6-3 | Hard |
| 2025-11-10 | Champaign | Quarter-Finals | stefan kozlov | darwin blanch | 6-2 6(7)-7 6-3 | Hard |
| 2025-11-10 | Champaign | Finals | stefan kozlov | murphy cassone | 7-6(3) 7-5 | Hard |
| 2025-11-03 | Knoxville | Round of 32 | stefan kozlov | dominique rolland | 7-6(1) 2-6 6-1 | Hard |
| 2025-11-03 | Knoxville | Round of 16 | jay clarke | stefan kozlov | 6-2 2-6 6-3 | Hard |
| 2025-08-04 | Chicago | 2nd Round Qualifying | tsung hao huang | stefan kozlov | 1-6 7-5 6-2 | Hard |
| 2025-08-04 | Chicago | 1st Round Qualifying | stefan kozlov | ramkumar ramanathan | 6-1 6(4)-7 5-3 RET | Hard |
| 2025-07-07 | Newport | Round of 32 | mitchell krueger | stefan kozlov | 6-1 3-6 6-1 | Grass |
| 2025-06-02 | Tyler | 2nd Round Qualifying | alvin nicholas tudorica | stefan kozlov | 7-5 6-3 | Hard |
| 2025-06-02 | Tyler | 1st Round Qualifying | stefan kozlov | daniel milavsky | 6-3 6(7)-7 6-3 | Hard |
| 2025-05-26 | Little Rock | Round of 32 | stefan kozlov | aziz dougaz | 5-7 6-3 6-2 | Hard |
| 2025-05-26 | Little Rock | Round of 16 | andy andrade | stefan kozlov | 6-1 4-6 7-5 | Hard |
| 2025-05-26 | Little Rock | 2nd Round Qualifying | stefan kozlov | elmar ejupovic | 6-4 7-6(5) | Hard |
| 2025-05-26 | Little Rock | 1st Round Qualifying | stefan kozlov | kiranpal pannu | 7-6(3) 2-6 6-2 | Hard |
| 2025-04-21 | Savannah | Round of 32 | stefan kozlov | max wiskandt | 6-2 6-1 | Clay |
Aliases
1
betfair
- stefan kozlov