Z. Zhang and D. Altmaier are level 1-1 in their head-to-head since 2018 over 2 matches.
| Surface | Z. Zhang | D. Altmaier |
|---|---|---|
| Clay | 1 | 1 |
| Date | Winner | Score | Event |
|---|---|---|---|
| May 6, 2026 | D. Altmaier | 2 - 1 | Rome · 1/64-finals · clay |
| July 28, 2023 | Z. Zhang | 2 - 0 | ATP Hamburg · Quarter-finals · clay |