Bianca Koch defeated Aida Martinez Sanjuan 6-4 6-4 in the Istanbul 10K round of 16 on clay. The result followed the form book — Bianca Koch came in leading the head-to-head 1–0. Bianca Koch extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-04-22 | Les Franqueses Del Valles 10K | R32 | hard | Bianca Koch | 6-2 4-6 6-4 |