Alexander Slabinsky defeated Dawid Olejniczak 6-4 6-4 in the Poland F6 qualifying round on clay. The upset overturned the form book — Dawid Olejniczak came in leading the head-to-head 2–0. Alexander Slabinsky claimed a first win over Dawid Olejniczak in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-03-24 | Great Britain F5 | QF | hard | Dawid Olejniczak | 7-6(4) 6-4 |
| 2006-10-16 | Great Britain F16 | R32 | hard | Dawid Olejniczak | 7-5 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.