Anja Prislan defeated Diana Sumova 6-1 3-6 6-0 in the Vendryne 25K q16 on hard. The upset overturned the form book — Diana Sumova came in leading the head-to-head 1–0. Anja Prislan claimed a first win over Diana Sumova in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-08-19 | Portschach 10K | R16 | clay | Diana Sumova | 6-1 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.