Eduardo Nicolas defeated Sergi Duran 6-4 6-4 in the Spain 3 Masters 4 qualifying round on clay. The upset overturned the form book — Sergi Duran came in leading the head-to-head 3–2. Eduardo Nicolas narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-01-30 | Spain 2 Masters 2 | R16 | clay | Sergi Duran | 6-2 6-2 |
| 1997-10-17 | Spain 9 Masters 1 | R16 | clay | Sergi Duran | 6-2 6-2 |
| 1996-07-12 | Spain 6 Masters 2 | R16 | clay | Eduardo Nicolas | 6-2 6-4 |
| 1994-08-12 | Spain 7 Masters 4 | R32 | clay | Eduardo Nicolas | 6-3 6-2 |
| 1994-07-08 | Spain 6 Masters 2 | R32 | clay | Sergi Duran | 1-6 6-1 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.