Andrian Raturandang defeated Lars Zimmermann 6-1 6-2 in the Indonesia F1 round of 32 on hard. The upset overturned the form book — Lars Zimmermann came in leading the head-to-head 1–0, but Andrian Raturandang had been the form player, winning 1 of their last 5 on hard. Andrian Raturandang claimed a first win over Lars Zimmermann in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-09-10 | USA 2 Masters 4 | R64 | hard | Lars Zimmermann | 6-4 6-1 |