Level, 2 wins each over 4 singles meetings since 2021. Last meeting on 23/06/2026 at Lexus Eastbourne Open - Eastbourne.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 23/06/2026 | Lexus Eastbourne Open - Eastbourne | Round 1 | grass | Altmaier | 6-4 7-6(4) |
| 14/03/2025 | Cap Cana Challenger | Quarter-final | hard | Kovacevic | 6-4 4-6 3-6 |
| 05/02/2025 | ABN AMRO Open - Rotterdam | Round 1 | indoor hard | Altmaier | |
| 28/10/2021 | Las Vegas Challenger | Round 2 | hard | Kovacevic | 6-7(7) 3-6 |
| grass | Altmaier 1 - 0 Kovacevic |
| hard | Altmaier 0 - 2 Kovacevic |
| indoor hard | Altmaier 1 - 0 Kovacevic |
| 2026 | Altmaier 1 - 0 Kovacevic |
| 2025 | Altmaier 1 - 1 Kovacevic |
| 2021 | Altmaier 0 - 1 Kovacevic |
193 wins, 173 losses since 2021 (52.7%).
Last matches: D D V D V
175 wins, 161 losses since 2021 (52.1%).
Last matches: D D V V V
Level, 2 wins each over 4 singles meetings since 2021.
On 23/06/2026, at Lexus Eastbourne Open - Eastbourne (Round 1): Daniel Altmaier won 6-4 7-6(4).