ATP Tennis - Stefan Kozlov
- Tournament: N/A
- Round: N/A
- Opponent: N/A
- DOB: 1998-02-01
- Birthplace: Macedonia, Macedonia
- Height: 72.0 cm
- Weight: 174.0 kg
- Plays: R
- Current World Rank: N/A
- Hard: 0-11
- Clay: 0-1
- Grass: 5-6
| Tournament | Date | Sets | Round | Winner | Loser |
|---|---|---|---|---|---|
| Mexican Open | Mar 16, 2021 | 6-3, 6-3 | First Round | Cameron Norrie | Stefan Kozlov |
| Delray Beach Open | Feb 18, 2020 | 6-7 (5-7), 6-3, 6-1 | First Round | Ugo Humbert | Stefan Kozlov |
| US Men's Clay Court Championship | Apr 10, 2018 | 6-3, 6-2 | First Round | Guido Pella | Stefan Kozlov |
| Tennis Masters Cincinnati | Aug 14, 2017 | 6-3, 6-0 | First Round | Sam Querrey | Stefan Kozlov |
| Citi Open | Jul 31, 2017 | 7-5, 2-0 | First Round | Yuki Bhambri | Stefan Kozlov |
| Atlanta Tennis Championships | Jul 24, 2017 | 7-5, 7-6 (9-7) | First Round | Quentin Halys | Stefan Kozlov |
| Hall of Fame Tennis Championships | Jul 17, 2017 | 6-2, 7-6 (7-5) | First Round | Adrian Menendez-Maceiras | Stefan Kozlov |
| AEGON Championships | Jun 22, 2017 | 6-0, 6-4 | Second Round | Marin Cilic | Stefan Kozlov |
| AEGON Championships | Jun 20, 2017 | 3-6, 6-1, 6-1 | First Round | Stefan Kozlov | Steve Johnson |
| Ricoh Open | Jun 15, 2017 | 6-4, 6-1 | Second Round | Ivo Karlovic | Stefan Kozlov |
