Jakub Nijaki defeated Dawid Olejniczak 6-4 3-6 6-4 in the Poland F6 round of 32 on clay. The upset overturned the form book — Dawid Olejniczak came in leading the head-to-head 5–0. Jakub Nijaki claimed a first win over Dawid Olejniczak in six meetings, narrowing the head-to-head to 5–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-06-05 | Poland F7 | R16 | clay | Dawid Olejniczak | 6-4 6-4 |
| 2005-07-30 | Sopot | Q32 | clay | Dawid Olejniczak | 6-2 6-0 |
| 2005-05-16 | Poland F1 | QF | clay | Dawid Olejniczak | 6-3 6-2 |
| 2004-08-30 | Poland F5 | R32 | clay | Dawid Olejniczak | 6-7(5) 7-5 6-3 |
| 2004-06-07 | Poland F3 | R32 | clay | Dawid Olejniczak | 4-6 6-0 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.