Marcella Koek defeated Iris Khanna 4-6 7-5 6-1 in the Rotterdam 10K round of 16 on clay. The upset overturned the form book — Iris Khanna came in leading the head-to-head 1–0. Marcella Koek claimed a first win over Iris Khanna in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-04-25 | Zell Am Harmersbach 10K | R16 | clay | Iris Khanna | 7-5 7-6(4) |