Elitsa Kostova defeated Constance Sibille 6-7 6-4 6-4 in the Joue Les Tours 50K round of 32 on hard. The result followed the form book — Elitsa Kostova came in leading the head-to-head 2–1. Elitsa Kostova extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-02-15 | Albufeira 1 10K | QF | hard | Elitsa Kostova | 7-6(6) 6-3 |
| 2009-11-16 | Equeurdreville 10K | SF | hard | Constance Sibille | 6-3 6-2 |
| 2007-09-17 | Limoges 10K | R16 | hard | Elitsa Kostova | 6-4 6-2 |
Averages over each player's completed matches in the selected window (200 vs 46). 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