Marko Tkalec defeated Sebastian Jaeger 7-6 3-6 7-5 in the Croatia 1 3 round of 16 on clay. The upset overturned the form book — Sebastian Jaeger came in leading the head-to-head 1–0, but Marko Tkalec had been the form player, winning 5 of their last 5 on clay. Marko Tkalec claimed a first win over Sebastian Jaeger in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-08-10 | Croatia F4 | R16 | clay | Sebastian Jaeger | 1-6 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.