Marko Tkalec defeated Blaz Trupej 7-6 4-6 6-3 in the Slovenia Masters 1 round of 16 on clay. The upset overturned the form book — Blaz Trupej 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 Blaz Trupej in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-08-25 | Croatia F6 | QF | clay | Blaz Trupej | 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.