Timothy Aerts defeated Reginald Willems 6-3 6-4 in the Belgium Masters 4 qualifying round on clay. The upset overturned the form book — Reginald Willems came in leading the head-to-head 2–0. Timothy Aerts claimed a first win over Reginald Willems in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-06-17 | France F10 | SF | clay | Reginald Willems | 6-7(5) 7-6(1) 6-0 |
| 1997-08-02 | Belgium Masters 1 | F | clay | Reginald Willems | 6-3 3-6 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.