Giulia Casoni defeated Catalina Castano 6-7 6-1 6-3 in the Roland Garros q64 on clay. The upset overturned the form book — Catalina Castano came in leading the head-to-head 2–0. Giulia Casoni claimed a first win over Catalina Castano in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-06-16 | Gorizia 25K | R32 | clay | Catalina Castano | 7-5 6-4 |
| 2003-06-09 | Grado 25K | QF | clay | Catalina Castano | 2-6 6-1 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.