Marcel Zielinski defeated John Sperle 7-5 6-4 in the M15 Antalya 8 round of 32 on clay. The result followed the form book — Marcel Zielinski came in leading the head-to-head 2–1. Marcel Zielinski extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-07-03 | M15 Amstelveen 1 | R32 | clay | John Sperle | 6-2 6-1 |
| 2023-04-26 | M15 Meerbusch 1 | R32 | clay | Marcel Zielinski | 7-6(5) 7-5 |
| 2022-08-15 | M15 Eindhoven 1 | Q16 | clay | Marcel Zielinski | 6-2 7-6(3) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.