Mario Tudor defeated Ivan Vajda 0-6 6-3 6-4 in the Croatia 4 Masters 4 qualifying round on clay. The upset overturned the form book — Ivan Vajda came in leading the head-to-head 3–0. Mario Tudor claimed a first win over Ivan Vajda in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-04-03 | Croatia 2 Masters 3 | R16 | clay | Ivan Vajda | 4-6 6-1 6-3 |
| 1999-04-03 | Croatia 2 Masters 4 | R32 | clay | Ivan Vajda | 6-3 6-7 6-0 |
| 1996-06-15 | Croatia 2 Masters 2 | R16 | clay | Ivan Vajda | 3-6 3-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.