Jan Kumstat leads 3 to 0 over 3 singles meetings since 2025. Last meeting on 16/08/2026 at Hamburg Challenger.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 16/08/2026 | Hamburg Challenger | Final | clay | Kumstat | 4-6 7-6(5) 7-5 |
| 12/06/2026 | M25 Ceska Lipa | Quarter-final | clay | Kumstat | 7-6 5-4 |
| 26/09/2025 | M25 Pardubice | Quarter-final | clay | Kumstat | 7-5 6-4 |
| clay | Moeller 0 - 3 Kumstat |
| 2026 | Moeller 0 - 2 Kumstat |
| 2025 | Moeller 0 - 1 Kumstat |
215 wins, 120 losses since 2021 (64.2%).
Last matches: D V V D D
73 wins, 45 losses since 2021 (61.9%).
Last matches: D V V V V
Jan Kumstat leads 3 to 0 over 3 singles meetings since 2025.
On 16/08/2026, at Hamburg Challenger (Final): Jan Kumstat won 4-6 7-6(5) 7-5.