Barbara Sobaszkiewicz defeated Anne Schaefer 6-2 6-2 in the Mallorca 10K qualifying round on clay. The upset overturned the form book — Anne Schaefer came in leading the head-to-head 2–0. Barbara Sobaszkiewicz claimed a first win over Anne Schaefer in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-07-30 | Bad Saulgau 25K | R16 | clay | Anne Schaefer | 5-7 7-6(5) 3-0 |
| 2006-06-05 | Warsaw 2 10K | QF | clay | Anne Schaefer | 6-2 3-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.