Ramkumar Ramanathan leads 2 to 1 over 3 singles meetings since 2021. Last meeting on 03/08/2025 at Chicago Challenger.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 03/08/2025 | Chicago Challenger | Qualifying 1 | hard | Kozlov | 6-1 6-7(4) 4-3 |
| 23/07/2022 | Truist Atlanta Open - Atlanta | Qualifying 1 | hard | Ramanathan | 6-0 6-1 |
| 25/07/2021 | Cary Challenger | Semi-final | hard | Ramanathan | 6-1 3-6 1-6 |
| hard | Ramanathan 2 - 1 Kozlov |
| 2025 | Ramanathan 0 - 1 Kozlov |
| 2022 | Ramanathan 1 - 0 Kozlov |
| 2021 | Ramanathan 1 - 0 Kozlov |
108 wins, 130 losses since 2021 (45.4%).
Last matches: D D D V D
142 wins, 110 losses since 2021 (56.3%).
Last matches: D V D D D
Ramkumar Ramanathan leads 2 to 1 over 3 singles meetings since 2021.
On 03/08/2025, at Chicago Challenger (Qualifying 1): Stefan Kozlov won 6-1 6-7(4) 4-3.