Roel Oostdam defeated Pirmin Haenle 7-5 6-1 in the Romania F9 round of 32 on clay. The upset overturned the form book — Pirmin Haenle came in leading the head-to-head 1–0. Roel Oostdam claimed a first win over Pirmin Haenle in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-07-07 | Romania F11 | R32 | clay | Pirmin Haenle | 6-4 4-6 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.