Dejan Petrovic defeated Sebastian Swierk 6-2 6-1 in the Serbia & Montenegro 1 1 round of 16 on clay. The upset overturned the form book — Sebastian Swierk came in leading the head-to-head 1–0. Dejan Petrovic claimed a first win over Sebastian Swierk in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-11-22 | Australia F4 | F | grass | Sebastian Swierk | 6-3 6-3 |