Federico Sanchez defeated Donald Johnson 6-4 6-2 in the Spain 5 Masters 1 round of 16 on clay. The upset overturned the form book — Donald Johnson came in leading the head-to-head 1–0. Federico Sanchez claimed a first win over Donald Johnson in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-06-15 | Spain 6 Masters 3 | R16 | clay | Donald Johnson | 3-6 6-4 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.