Elena Chalova defeated Justine Ozga 6-1 6-3 in the Bielefeld 10K qualifying round on clay. The upset overturned the form book — Justine Ozga came in leading the head-to-head 1–0. Elena Chalova claimed a first win over Justine Ozga in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-02-07 | Stockholm 25K | R32 | hard | Justine Ozga | 6-4 7-5 |