Wayne Ferreira defeated Jan Siemerink 6-4 6-2 in the Hamburg Masters round of 64 on clay. The upset overturned the form book — Jan Siemerink came in leading the head-to-head 1–0, defending last year's round of 64. Wayne Ferreira claimed a first win over Jan Siemerink in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-08-10 | Cincinnati Masters | R32 | hard | Jan Siemerink | 7-6(5) 6-4 |
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 (199 vs 153). ATP, WTA & Challenger.