Sergi Duran defeated Oscar Martinez Dieguez 6-2 6-4 in the Spain 2 Masters 1 round of 32 on clay. The upset overturned the form book — Oscar Martinez Dieguez came in leading the head-to-head 1–0. Sergi Duran claimed a first win over Oscar Martinez Dieguez in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-01-03 | Spain 1 Masters 4 | R32 | clay | Oscar Martinez Dieguez | 2-6 6-2 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.