Marc Fornell Mestres defeated Diego Hipperdinger 4-6 6-3 6-4 in the Spain 6 3 qualifying round on clay. The upset overturned the form book — Diego Hipperdinger came in leading the head-to-head 3–0. Marc Fornell Mestres claimed a first win over Diego Hipperdinger in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-08-11 | Spain F18 | F | clay | Diego Hipperdinger | 6-4 7-6(8) |
| 2003-03-03 | Spain 2 3 | R32 | clay | Diego Hipperdinger | 6-1 1-6 7-6(2) |
| 2000-07-10 | Spain F1 | R16 | clay | Diego Hipperdinger | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.