Sebastian Jaeger defeated Jan Vacek 6-4 6-4 in the Germany F2 round of 32 on clay. The upset overturned the form book — Jan Vacek came in leading the head-to-head 1–0. Sebastian Jaeger claimed a first win over Jan Vacek in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-10-04 | Germany F12 | QF | hard | Jan Vacek | 6-4 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.