Sjeng Schalken defeated Stefan Koubek 6-4 3-6 6-4 6-7 7-5 in the Wimbledon round of 128 on grass. The upset overturned the form book — Stefan Koubek came in leading the head-to-head 2–0, defending last year's round of 64. Sjeng Schalken claimed a first win over Stefan Koubek in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-10-18 | Madrid Masters | R64 | clay | Stefan Koubek | 6-4 6-4 |
| 2001-08-06 | Cincinnati Masters | R32 | hard | Stefan Koubek | 6-1 7-6(5) |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (200 vs 200). ATP, WTA & Challenger.