Kresimir Ritz defeated Marko Tkalec 3-6 6-3 6-4 in the Slovenia F3 qualifying round on clay. The upset overturned the form book — Marko Tkalec came in leading the head-to-head 7–0. Kresimir Ritz claimed a first win over Marko Tkalec in eight meetings, narrowing the head-to-head to 7–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-03-19 | Croatia F4 | R16 | clay | Marko Tkalec | 6-4 6-4 |
| 2005-08-29 | Croatia F6 | R32 | clay | Marko Tkalec | 6-2 6-3 |
| 2005-08-22 | Croatia F5 | R16 | clay | Marko Tkalec | 6-0 6-4 |
| 2003-10-13 | Croatia F9 | R16 | clay | Marko Tkalec | 6-2 7-5 |
| 2002-06-03 | Slovenia F1 | R32 | clay | Marko Tkalec | 6-2 6-1 |
| 2000-06-05 | Slovenia F1 | R32 | clay | Marko Tkalec | 6-2 7-5 |
| 1998-07-22 | Slovenia F2 | R16 | clay | Marko Tkalec | 7-5 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.