Pekin 
Osaka 
Seoul 
Monastir 
Sofia 1 
Barranquilla 
Bonn 
Hersonissos 3 
Cordenons 
Grodzisk Mazowiecki 
Davis Сup Group I Tennis. Played Kozlov Stefan. Season 2025
Country 
USA. Ranking ATP 433.
USA. Ranking ATP 433.| Chicago | ||||
|---|---|---|---|---|
| 03.08.2025 | Qualifications - 1st round | Kozlov Stefan — Ramanathan Ramkumar (Retired) | 1:1 (6:1, 6:7, 5:3) |
|
| Newport | ||||
| 07.07.2025 | First round | Krueger Mitchell — Kozlov Stefan | 2:1 (6:1, 3:6, 6:1) |
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| Little Rock | ||||
| 29.05.2025 | Second round | Andrade Andres — Kozlov Stefan | 2:1 (6:1, 4:6, 7:5) |
|
| 28.05.2025 | Qialification final | Kozlov Stefan — Ejupovic Elmar | 2:0 (6:4, 7:6) |
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| 28.05.2025 | First round | Kozlov Stefan — Dougaz Aziz | 2:1 (5:7, 6:3, 6:2) |
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| 27.05.2025 | Qualifications - 1st round | Kozlov Stefan — Pannu Kiranpal | 2:1 (7:6, 2:6, 6:2) |
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| Savannah | ||||
| 26.04.2025 | Quarter-finals | Spizzirri Eliot — Kozlov Stefan | 2:0 (6:3, 7:5) |
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| 24.04.2025 | Second round | Kozlov Stefan — Blancaneaux Geoffrey (Retired) | 1:0 (6:1, 3:1) |
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| 22.04.2025 | First round | Wiskandt Max — Kozlov Stefan | 0:2 (2:6, 1:6) |
|
 Cuernavaca | ||||
| 01.04.2025 | First round | Tirante Thiago Agustin — Kozlov Stefan | 1:2 (6:4, 4:6, 2:6) |
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| ATP - Abierto Mexicano Telcel | ||||
| 24.02.2025 | Qialification final | Kozlov Stefan — Basavareddy Nishesh | 0:2 (2:6, 4:6) |
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| 23.02.2025 | Qualifications - 1st round | Hijikata Rinky — Kozlov Stefan | — — |
|
| ATP - Delray Beach International Tennis Championships | ||||
| 08.02.2025 | Qualifications - 1st round | Svajda Zachary — Kozlov Stefan | 2:0 (6:3, 6:0) |
|
| Cleveland | ||||
| 01.02.2025 | Quarter-finals | Wolf Jeff — Kozlov Stefan | 2:0 (6:1, 6:3) |
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| 28.01.2025 | First round | Braswell Micah — Kozlov Stefan | 1:2 (6:4, 3:6, 4:6) |
|
 Quimper | ||||
| 22.01.2025 | First round | Moller Elmer — Kozlov Stefan | 2:0 (6:3, 7:5) |
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| 20.01.2025 | Qualifications - 1st round | Kozlov Stefan — Misolic Filip | 2:0 (6:3, 6:4) |
|