Margit Ruutel defeated Andrea Sieveke 6-1 6-1 in the IstanbulKemer 25K round of 32 on hard. The upset overturned the form book — Andrea Sieveke came in leading the head-to-head 1–0. Margit Ruutel claimed a first win over Andrea Sieveke in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-09-25 | Nottingham 25K | R16 | hard | Andrea Sieveke | 6-4 7-6(2) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.