Lubomira Bacheva defeated Patty Van Acker 5-7 6-4 6-3 in the Biel 25K semi-final on hard. The result followed the form book — Lubomira Bacheva came in leading the head-to-head 2–1. Lubomira Bacheva extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-02-15 | Redbridge 25K | R16 | hard | Patty Van Acker | 6-3 6-4 |
| 1998-10-26 | Poitiers 50K | R32 | hard | Lubomira Bacheva | 6-3 6-4 |
| 1998-04-06 | Calvi 25K | R32 | hard | Lubomira Bacheva | 7-5 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.