Margit Ruutel defeated Joanna Sakowicz Kostecka 7-6 6-2 in the Glasgow 25K qualifying round on hard. The upset overturned the form book — Joanna Sakowicz Kostecka came in leading the head-to-head 3–1. Margit Ruutel narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-03-12 | Las Palmas De Gran Canaria 25K | R32 | hard | Joanna Sakowicz Kostecka | 6-2 2-6 7-5 |
| 2005-12-05 | Prerov 25K | SF | carpet | Joanna Sakowicz Kostecka | 6-2 6-3 |
| 2005-04-23 | Fed Cup G1 PO: EST vs POL | RR | clay | Margit Ruutel | 6-1 |
| 2005-01-31 | Sunderland 1 25K | R32 | hard | Joanna Sakowicz Kostecka | 7-5 5-7 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.