Darina Sedenkova defeated Natalia Kolat 6-2 7-5 in the Olecko 10K qualifying round on clay. The upset overturned the form book — Natalia Kolat came in leading the head-to-head 2–0. Darina Sedenkova claimed a first win over Natalia Kolat in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-07-10 | Torun 25K | R32 | clay | Natalia Kolat | 6-3 2-6 6-4 |
| 2006-05-08 | Warsaw 1 10K | QF | clay | Natalia Kolat | 4-6 6-4 7-6(3) |