Danielle Harmsen defeated Tereza Martincova 6-1 6-0 in the Wiesbaden 10K round of 32 on clay. The upset overturned the form book — Tereza Martincova came in leading the head-to-head 1–0. Danielle Harmsen claimed a first win over Tereza Martincova in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-01-17 | Stuttgart Stammheim 10K | R32 | hard | Tereza Martincova | 1-6 6-3 7-6(3) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.