Thierry Guardiola defeated Olivier Soules 6-2 7-5 in the Netherlands Masters 4 semi-final on clay. The upset overturned the form book — Olivier Soules came in leading the head-to-head 1–0. Thierry Guardiola claimed a first win over Olivier Soules in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-06-24 | Netherlands Masters 3 | F | clay | Olivier Soules | 7-5 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.