Marcel Zielinski defeated Benjamin Pietri 6-4 6-1 in the M15 Telde 1 round of 32 on clay. The upset overturned the form book — Benjamin Pietri came in leading the head-to-head 2–0. Marcel Zielinski claimed a first win over Benjamin Pietri in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-04-17 | M15 Telde 2 | R32 | clay | Benjamin Pietri | 6-0 3-0 |
| 2022-11-03 | M15 Heraklion 8 | R16 | hard | Benjamin Pietri | 6-1 6-3 |