Jeff Coetzee defeated Reginald Willems 6-3 6-4 in the Cuba Mexico Masters 4 qualifying round on hard. The upset overturned the form book — Reginald Willems came in leading the head-to-head 2–0. Jeff Coetzee claimed a first win over Reginald Willems in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-02-07 | Cuba Mexico Masters 3 | R16 | hard | Reginald Willems | 6-4 7-6 |
| 1996-09-27 | Portugal 3 Masters 1 | R16 | hard | Reginald Willems | 6-2 4-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.