Katie Obrien defeated Tatjana Malek 6-3 6-0 in the Biberach 50K round of 16 on hard. The upset overturned the form book — Tatjana Malek came in leading the head-to-head 2–0. Katie Obrien claimed a first win over Tatjana Malek in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-10-23 | Istanbul 25K | SF | hard | Tatjana Malek | 1-0 |
| 2005-10-24 | Istanbul 25K | R32 | hard | Tatjana Malek | 6-2 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.