Mislav Hizak defeated Nikola Mektic 6-3 2-6 7-5 in the Croatia F8 qualifying round on clay. The upset overturned the form book — Nikola Mektic came in leading the head-to-head 3–1. Mislav Hizak narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-05-31 | Slovenia F2 | R16 | clay | Nikola Mektic | 7-6(2) 6-3 |
| 2009-09-21 | Bosnia & Herzegovina F5 | R32 | clay | Nikola Mektic | 6-4 7-5 |
| 2009-08-17 | Croatia F6 | SF | clay | Nikola Mektic | 4-6 6-1 6-2 |
| 2007-08-20 | Croatia F7 | R32 | clay | Mislav Hizak | 6-2 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.