Oscar Martinez Dieguez defeated Sergi Duran 2-6 6-2 7-5 in the Spain 1 Masters 4 round of 32 on clay. The upset overturned the form book — Sergi Duran came in leading the head-to-head 1–0. Oscar Martinez Dieguez claimed a first win over Sergi Duran in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-01-31 | Spain 2 Masters 1 | R32 | clay | Sergi Duran | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.