Jan Siemerink defeated Wayne Ferreira 7-6 6-4 in the Cincinnati Masters round of 32 on hard. The upset overturned the form book — Wayne Ferreira came in leading the head-to-head 1–0, defending last year's round of 32. Jan Siemerink claimed a first win over Wayne Ferreira in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-05-04 | Hamburg Masters | R64 | clay | Wayne Ferreira | 6-4 6-2 |
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 (153 vs 199). ATP, WTA & Challenger.