Tanja Ostertag defeated Anne Schaefer 6-3 6-1 in the Vessy 10K semi-final on clay. The upset overturned the form book — Anne Schaefer came in leading the head-to-head 1–0. Tanja Ostertag claimed a first win over Anne Schaefer in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-07-11 | Garching 10K | R32 | clay | Anne Schaefer | 6-3 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.