Reginald Willems defeated Djalmar Sistermans 7-6 6-2 in the Netherlands Masters 4 qualifying round on clay. The result followed the form book — Reginald Willems came in leading the head-to-head 1–0. Reginald Willems extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-06-15 | Netherlands Masters 2 | R32 | clay | Reginald Willems | 2-6 6-3 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.