D. Altmaier leads the head-to-head 3-2 since 2018 against A. Kovacevic, over 5 matches.
| Surface | D. Altmaier | A. Kovacevic |
|---|---|---|
| Grass | 1 | 0 |
| Hard | 2 | 2 |
| Date | Winner | Score | Event |
|---|---|---|---|
| June 23, 2026 | D. Altmaier | 2 - 0 | Eastbourne · 1/16-finals · grass |
| March 14, 2025 | A. Kovacevic | 2 - 1 | Cap Cana · Quarter-finals · hard |
| Feb. 5, 2025 | D. Altmaier | 2 - 1 | Rotterdam · 1/16-finals · hard |
| Oct. 28, 2021 | A. Kovacevic | 2 - 0 | Las Vegas · 1/8-finals · hard |
| Jan. 10, 2020 | D. Altmaier | 2 - 1 | Ann Arbor · 1/8-finals · hard |