Jalal Chafai defeated Lars Zimmermann 6-2 6-4 in the Netherlands 3 round of 32 on clay. The upset overturned the form book — Lars Zimmermann came in leading the head-to-head 1–0, but Jalal Chafai had been the form player, winning 3 of their last 5 on clay. Jalal Chafai claimed a first win over Lars Zimmermann in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-01-04 | USA F1 | R64 | hard | Lars Zimmermann | 6-3 6-1 |