Daniel Siniakov defeated Piotr Grynkowski 6-3 3-6 6-1 in the M15 Bratislava 1 round of 32 on hard. The upset overturned the form book — Piotr Grynkowski came in leading the head-to-head 1–0. Daniel Siniakov claimed a first win over Piotr Grynkowski in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-03-26 | M25 Trnava 1 | Q16 | hard | Piotr Grynkowski | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.