Ivan Cinkus defeated Marko Tkalec 6-4 6-1 in the Croatia 1 2 qualifying round on clay. The upset overturned the form book — Marko Tkalec came in leading the head-to-head 3–0. Ivan Cinkus claimed a first win over Marko Tkalec in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-03-04 | Croatia 1 1 | R16 | clay | Marko Tkalec | 7-6(5) 7-6(8) |
| 2000-11-06 | Cyprus F1 | QF | clay | Marko Tkalec | 6-1 7-6(1) |
| 2000-03-18 | Croatia 1 3 | QF | clay | Marko Tkalec | 4-6 6-3 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.