Oscar Martinez Dieguez defeated Juan Giner 3-6 7-6 6-3 in the Spain 4 1 round of 32 on clay. The upset overturned the form book — Juan Giner came in leading the head-to-head 2–0. Oscar Martinez Dieguez claimed a first win over Juan Giner in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-07-06 | Spain F1 | R32 | clay | Juan Giner | 2-6 6-1 6-4 |
| 1997-07-04 | Spain 6 Masters 2 | R16 | clay | Juan Giner | 6-2 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.