Diana Sumova defeated Anja Prislan 6-1 6-0 in the Portschach 10K round of 16 on clay. The upset overturned the form book — Anja Prislan came in leading the head-to-head 1–0. Diana Sumova claimed a first win over Anja Prislan in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-11-28 | Vendryne 25K | Q16 | hard | Anja Prislan | 6-1 3-6 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.