Diana Marcinkevica defeated Jana Jandova 6-1 6-0 in the Opole 25K round of 32 on carpet. The upset overturned the form book — Jana Jandova came in leading the head-to-head 1–0. Diana Marcinkevica claimed a first win over Jana Jandova in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-07-19 | Horb 10K | R32 | clay | Jana Jandova | 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.