Marko Tkalec advanced when Adolf Musil retired 5-7 6-4 3-0 in the Croatia F1 qualifying round. Marko Tkalec extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-07-26 | Slovenia F3 | R16 | clay | Marko Tkalec | 7-5 7-6 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.