David De Miguel defeated Federico Sanchez 7-6 6-4 in the Spain 1 Masters 4 qualifying round on carpet. The upset overturned the form book — Federico Sanchez came in leading the head-to-head 1–0. David De Miguel claimed a first win over Federico Sanchez in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-06-15 | Spain 6 Masters 1 | SF | clay | Federico Sanchez | 7-5 |