Nathalie Vierin defeated Sandra Kloesel 7-5 6-4 in the Vaihingen 25K semi-final on clay. The upset overturned the form book — Sandra Kloesel came in leading the head-to-head 2–1, but Nathalie Vierin had been the form player, winning 1 of their last 7 on clay. Nathalie Vierin narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-04-24 | Cagnes sur Mer 75K | R32 | clay | Sandra Kloesel | 3-6 6-3 6-2 |
| 2005-01-31 | Ortisei 75K | R32 | carpet | Sandra Kloesel | 6-2 6-2 |
| 2004-05-24 | Roland Garros | Q128 | clay | Nathalie Vierin | 6-4 4-6 6-2 |
Averages over each player's completed matches in the selected window (11 vs 22). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About